Tibbitts, T. Lee (ORCID: 0000-0002-0290-7592) Savage, Susan E. Sesser, Kristin A. Kaler, Robb S.A. 20190301 document Inventory Data of Lowland-Breeding Birds and Associated Vegetation Types on the Alaska Peninsula, 2004-2007 ver 2.0, May 2022 Anchorage, Alaska U.S. Geological Survey, Alaska Science Center Suggested Citation: Tibbitts, T.L., Savage, S.E., Sesser, K.A., Kaler, R.S.A., 2019, Inventory data of lowland-breeding birds and associated vegetation types on the Alaska Peninsula, 2004-2007 (ver 2.0, May 2022): U.S. Geological Survey data release, https://doi.org/10.5066/P9FR8FLZ https://doi.org/10.5066/P9FR8FLZ U.S. Geological Survey, Alaska Science Center 2001 website Alaska Science Portal 82 Anchorage, Alaska U.S. Geological Survey, Alaska Science Center This is a link to the broader USGS Alaska Science Center research project supported by these data. Users will find a description of the research project and links to associated reports, publications, and data products. https://alaska.usgs.gov/portal/project.php?project_id=82 These are raw field data from a stratified random survey to inventory the birds breeding in lowlands (elevation below 100m) of the Alaska Peninsula, during summers 2004-2007. Data were collected at 792 survey points (10-minute point counts) on 52 5-km x 5-km plots. The data are in a PDF format of digitally scanned original field data forms which describe the 52 plots (four PDF files, one per year) and 792 points (four PDF files, one per year). This was the first systematic inventory of birds in the lowlands (elevation below 100 m) of the Alaska Peninsula to determine their breeding distributions and habitat associations in this remote region. These data form a baseline to monitor any future changes in bird distribution and abundance on the Alaska Peninsula. 20040513 20070526 observed Complete None planned The Alaska Peninsula in southwest Alaska; south of the Naknek River and north of Port Moller. -160.39 -155.93 58.48 56.10 USGS Metadata Identifier USGS:ASC202 ISO 19115 Topic Category Biota Environment NASA GCMD Earth Science Keyword Thesaurus Earth Science Biological Classification Animals/Vertebrates Birds USGS CSA Biocomplexity Thesaurus Migratory birds Seasonal distribution Distribution Habitat preferences USGS Thesaurus Wildlife Biogeography Habitats Natural resource management Ornithology None Emperor Goose Snow Goose Greater White-fronted Goose Cackling Goose Canada Goose Tundra Swan Northern Shoveler Gadwall Eurasian Wigeon American Wigeon Mallard Northern Pintail Green-winged Teal Canvasback Greater Scaup Harlequin Duck Surf Scoter White-winged Scoter Black Scoter Long-tailed Duck Bufflehead Common Goldeneye Barrow's Goldeneye Common Merganser Red-breasted Merganser Willow Ptarmigan Rock Ptarmigan Horned Grebe Red-necked Grebe Sandhill Crane Black-bellied Plover Pacific Golden-plover Semipalmated Plover Whimbrel Hudsonian Godwit Marbled Godwit Black Turnstone Dunlin Rock Sandpiper Least Sandpiper Pectoral Sandpiper Semipalmated Sandpiper Western Sandpiper Short-billed Dowitcher Wilson's Snipe Red-necked Phalarope Spotted Sandpiper Wandering Tattler Greater Yellowlegs Parasitic Jaeger Long-tailed Jaeger Black-legged Kittiwake Glaucous-winged Gull Short-billed Gull (formerly Mew Gull) Aleutian Tern Arctic Tern Red-throated loon Common Loon Pacific Loon Double-crested Cormorant Golden Eagle Northern Harrier Northern Goshawk Bald Eagle Rough-legged Hawk Short-eared Owl Belted Kingfisher Downy Woodpecker Merlin Gyrfalcon Peregrine Falcon Alder Flycatcher Northern Shrike Black-billed Magpie Common Raven Black-capped Chickadee Tree Swallow Bank Swallow American Dipper Gray-cheeked Thrush Hermit Thrush American Robin Eastern Yellow Wagtail American Pipit Pine Grosbeak Common Redpoll Lapland Longspur American Tree Sparrow Fox Sparrow White-crowned Sparrow Golden-crowned Sparrow Savannah Sparrow Orange-crowned Warbler Yellow Warbler Yellow-rumped Warbler Wilson's Warbler USGS Geographic Names Information System Alaska Alaska Peninsula Naknek River Port Moller None Birds Clements, J.F. Schulenberg, T.S. Iliff, M.J. Billerman, S.M. Fredericks, T.A. Gerbracht, J.A. Lepage, D. Sullivan, B.L. Wood, C.L. 2021 online database online Cornell Lab of Ornithology Clements, J.F., Schulenberg, T.S., Iliff, M.J., Billerman, S.M., Fredericks, T.A., Gerbracht, J.A., Lepage, D., Sullivan, B.L., Wood, C.L. 2021. The eBird/Clements Checklist of Birds of the World: v2021. https://www.birds.cornell.edu/clementschecklist/updateindex/ https://www.birds.cornell.edu/clementschecklist/ Taxonomy within the class aves (birds) is provided in the data tables. We follow the most current (as of April 2022) taxonomic designations of the eBird/Clements Checklist of Birds of the World: v2021 (which closely aligns with American Ornithological Union's (AOU) Checklist of North American Birds (7th edition, with updates through the 60th supplement.) Species were identified by skilled observers in the field based on general appearance of feathers and plumage, behavior, and vocalization. Provided here is the classification of birds to the rank of class. Further details of taxonomy are provided in the table "birdInventory_taxonomy_AKPen_tibbitts_2004_2007.csv" included with this data package. Kingdom Animalia Subkingdom Bilateria Infrakingdom Deuterostomia Phylum Chordata Subphylum Vertebrata Infraphylum Gnathostomata Superclass Tetrapoda Class Aves None It is requested that the authors and the USGS Alaska Science Center be cited for any subsequent publications that reference this dataset. U.S. Geological Survey, Alaska Science Center Mailing and Physical

4210 University Drive

Anchorage Alaska 99508 USA 907-786-7000 ascweb@usgs.gov Savage, S.E. Tibbitts, T.L. Sesser, K.A. Kaler, R.S.A. 2018 journal article Journal of Fish and Wildlife Management 9(2):637-658 online U.S. Fish and Wildlife Service Savage, S.E., Tibbitts, T.L., Sesser, K.A., Kaler, R.S.A. 2018. Inventory of lowland-breeding birds on the Alaska Peninsula. Journal of Fish and Wildlife Management 9(2):637–658 doi:10.3996/082017-JFWM-070 https://doi.org/10.3996/082017-JFWM-070 Data are digitally scanned original field data forms. Attribute values fall within expected ranges and data were checked for duplication and omission. Point count locations that fell outside the boundaries of the plots were removed from the analysis. This only occurred with two point counts in 2004 due to human error. Positions were obtained using handheld Garmin GPSs. Positional accuracy estimated to be within 3 meters. Field Observers conducted 792 10-min point counts of birds within 52 5-km × 5-km plots that were randomly selected and stratified by elevation and land cover. Surveys were conducted from mid-May to early June. In each plot all species encounters as well as physical conditions recorded on plot field data forms. Further, species, their behavior, and habitat class at each point were recorded on the point field data forms. Field At each point visited, observers recorded the percent cover of all vegetation types within 50m of the point in dense vegetation (e.g., alder thickets, n = 96 points) and 150 m of the point in open vegetation (e.g., sedge meadows, n = 607 points). Observers took four digital photographs of vegetation in the four cardinal directions to create a baseline for any future studies of vegetation change in the region. Viereck, L.A. Dyrness, C.T. Batten, A.R. Wenzlick, K.J. 1992 document General Technical Report, U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station PNW-GTR-286 Portland, Oregon U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station Viereck, L.A., Dyrness, C.T., Batten, A.R., Wenzlick, K.J. 1992. The Alaska vegetation classification. General Technical Report PNW-GTR-286. U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, Portland, Oregon. 278 pp doi:10.2737/PNW-GTR-286 https://doi.org/10.2737/PNW-GTR-286 document 1992 publication date Viereck et al. 1992 Source of the vegetation classification system. Original plot and point data forms were digitally scanned and saved as PDF files. PDF documents were checked for legibility and documents were rescanned if necessary. Unknown Plot numbers and survey point names are used to reference specific geographic coordinates. Point 0.0001 0.0001 Decimal degrees World Geodetic System of 1984 (WGS84) World Geodetic System of 1984 (WGS84) 6378137 298.257223563 birdInventory_plot_DataForm_AKPen_tibbitts_2004.pdf Digital scans of the original field data forms providing information about the 5-km x 5-km bird count plots. Presented as a PDF file. Author Defined Block_ID Identifier of the U.S. Fish and Wildlife Service sampling grid block in which the bird survey plot is located. Author Defined Unique identifier of the U.S. Fish and Wildlife Service sampling grid block. Plot Individual identifier of the 5-km x 5-km bird count plots. Corresponds to the "Plot" attribute in other tables included with this data package. The geographic bounding coordinates of the plots are provided in the table "birdInventory_plot_LatLong_AKPen_tibbitts_2004_2007.csv" Author Defined 116 1844 Total Hours Total number of hours that observers were present on the bird survey plot. Author Defined Estimate of field effort Dates Dates that observers were present on the bird survey plot. Author Defined Estimate of field effort Observers Individual identifier of the bird observers. Author Defined Unique identifier: observers initials. Avian Species Common name and evidence of breeding avian species identified on bird count plots. Author Defined The eBird/Clements Checklist of Birds of the World: v2021 Clements Checklist of Birds of the World. https://www.birds.cornell.edu/clementschecklist/updateindex/august-2021/ Mammal Species Common name and evidence of mammalian species identified on bird count plots. Author Defined Synopsis of mammalian encounters Lat Camp Latitude (WGS84) of camp site used by observers while surveying bird count plot. Author Defined Camp location Long Camp Latitude (WGS84) of camp site used by observers while surveying bird count plot. Author Defined Camp location General conditions at plot Place for observers to describe physical conditions on the plot during the survey, including: 1) extent of ground thaw, 2) condition of creeks and rivers, 3) lakes and ponds, 4) amount of snow cover, 5) high and low temperature, and 6) extent of vole and lemming sign. Author Defined Free text to describe plot conditions. birdInventory_plot_DataForm_AKPen_tibbitts_2005-2007.pdf Digital scans of the original field data forms providing information about the 5 km x 5 km bird count plots. Presented as three separate PDF files, one for each year (2005, 2006, 2007). Author Defined Block_ID Identifier of the U.S. Fish and Wildlife Service sampling grid block in which the bird survey plot is located. Author Defined Unique identifier of the U.S. Fish and Wildlife Service sampling grid block. Plot Individual identifier of the 5-km x 5-km bird count plots. Corresponds to the "Plot" attribute in other tables included with this data package. The geographic bounding coordinates of the plots are provided in the table "birdInventory_plot_LatLong_AKPen_tibbitts_2004_2007.csv" in the transcribed data portion of this data release. Author Defined 116 1844 Total Effort Total number of hours that observers were present and distance walked on the bird survey plot. Author Defined Estimate of field effort Dates Dates that observers were present on the bird survey plot. Author Defined Estimate of field effort Observers Individual identifier of the bird observers. Author Defined Unique identifier: observers initials. Avian Species Common name, evidence of breeding, and abundance of avian species identified on bird count plots. Author Defined The eBird/Clements Checklist of Birds of the World: v2021 Clements Checklist of Birds of the World. https://www.birds.cornell.edu/clementschecklist/updateindex/august-2021/ Mammalian Species Common name and evidence of mammalian species identified on bird count plots. Author Defined Synopsis of mammalian encounters Other Information Place for observers to record information about plot sampling Author Defined Datum The datum setting of the GPS unit used. Author Defined GPS Model Model of the GPS unit used by observers on the plot. Author Defined Temperature Minimum and maximum ambient temperature while observers were on plot. Author Defined Invertebrate Activity Place for observers to record information about invertebrate activity during plot sampling. Author Defined Mosquitoes Descriptor of the relative abundance of mosquitoes while observers were on the plot. Author Defined Black flies Descriptor of the relative abundance of black flies while observers were on the plot. Author Defined Lepidopterians Descriptor of the relative abundance of butterflies and moths while observers were on the plot. Author Defined Other Descriptor of the presence and relative abundance of other invertebrates while observers were on the plot. Author Defined Other Wildlife Observations Place for observers to record presence of non-avian and non-mammalian wildlife species encountered on the plot. Author Defined Wood frog Descriptor of the relative abundance of wood frogs while observers were on the plot. Author Defined Other Descriptor of the presence and relative abundance of other wildlife while observers were on the plot. Author Defined Lat Camp Latitude camp site used by observers while surveying bird count plot. Author Defined Camp location Long Camp Latitude camp site used by observers while surveying bird count plot. Author Defined Camp location Overall Conditions Place for observers to describe physical conditions on the plot during the survey, including: 1) condition of creeks and rivers, 2) lakes and ponds, 3) amount of snow cover, 4) extent of vole and lemming sign, 5) additional notes. Author Defined Free text to describe plot conditions. birdInventory_pointCount_DataForms_AKPen_tibbitts_2004.pdf Digital scans of the original field data forms from 2004 providing environmental information and observational data of the 792 bird point counts completed on the Alaska Peninsula. Presented as a PDF file. Author Defined Plot Individual identifier of the 5-km x 5-km bird count plots. Corresponds to the "Plot" attribute in other tables included with this data package. The geographic bounding coordinates of the plots are provided in the table "birdInventory_plot_LatLong_AKPen_tibbitts_2004_2007.csv" in the transcribed data portion of this data release. Author Defined 116 1844 No Units Transect Individual identifier of each transect within each 5-km x 5-km bird count plot. Author Defined Individual identifier of each transect within each 5-km x 5-km bird count plot. Point Individual identifier of each 10-min bird count point. Composed from the: Plot number, Transect ID, and Point Number. Corresponds to the "Plot_TransPt" attribute in all tables included with this data release. Author Defined Unique identifier: determined by the concatenation of Plot number (116-1844), Transect ID (A-G,Z), and Point number (1-9). Date Date that observers conducted the point count. Author Defined 05-13-04 05-26-04 Date (MM-DD-YY) Time Start time of the bird point count. Recorded to the nearest minute in 24-hour local time (0001-2400 hrs). Author defined 0726 2228 24-hrs Obs1 Initials of the primary observer. Author defined Initials of the primary observer. Obs2 Initials of the secondary observer. Author defined Initials of the secondary observer. Precip Precipitation code for the conditions at the start of each 10-min bird point count. Author defined 0 Clear of a few clouds Author defined 1 Partly cloudy (scattered) or variable sky Author defined 2 Cloudy (broken) or overcast Author defined 4 Fog or smoke Author defined 5 Drizzle Author defined 7 Snow Author defined 8 Showers Author defined Temp The ambient temperature in the shade at the end of the 10-min point count (degrees Fahrenheit). Author defined Ambient temperature in the shade at the end of the 10-min point count (degrees Fahrenheit). Elev The elevation (m or ft) of each point count location; collected by GPS unit. Author defined Elevation (m or ft) of each point count location; collected by GPS unit. Slope The slope (degrees) at each point count location using the edge of a compass. Author defined Slope (degrees) at each point count location. Aspect The aspect (direction) of the slope at each point count location. Author defined Aspect (direction) of the slope at each point count location. Wind Speed The wind speed indicated by the Beaufort Scale Author defined 0 wind speed 0-1 mph, calm; smoke rises vertically National Weather Service 1 wind speed 1-3 mph, light air; direction of wind shown by smoke drift National Weather Service 2 wind speed 4-7 mph, light breeze; small wavelets on waterbody National Weather Service 3 wind speed 8-12 mph, gentle breeze; large wavelets on waterbody National Weather Service 4 wind speed 13-18 mph, moderate breeze; small waves on waterbody National Weather Service 5 wind speed 19-24 mph, fresh breeze; moderate waves on waterbody National Weather Service Obs. Conditions Weather conditions (esp. wind, fog, precipitation) as they affect bird detection during each 10-min bird count. Author defined Good Weather conditions not limiting bird detection (visual or aural) or bird activity. Thus, good visibility, minimal wind, no precipitation. Author defined Fair Weather conditions slightly limiting bird detection (visual or aural) or bird activity. Author defined Poor Weather conditions limiting bird detection (visual or aural) or bird activity. Author defined Viereck Class Viereck et al. 1992 vegetation classification codes for a 150 m radius circle surrounding a point count location in open habitats and a 50 m radius circle surround a point count location in forested habitats. A rangefinder was used to determine distances from the observer. Author defined Viereck et al. 1992 vegetation classification code Percent Total The estimated percent cover (to the nearest 5%) of vegetation types and standing water within the 150 m or 50 m vegetation circles. Author defined The estimated percent cover (to the nearest 5%) of vegetation types and standing water within the vegetation circles. Dominant Species The dominant plant species within each vegetation circle. Author defined The dominant plant species within each vegetation circle. Waypoint Number The waypoint number, latitude, longitude and GPS location error at the marked point count location. Latitude and longitude are provided in decimal degrees (NAD27). The marked point count location is the same as the observer location. Author defined The waypoint number, latitude, longitude and GPS location error at the bird point count location. Observation Number A consecutive observation number. Each point count starts with observation 1. Author defined A consecutive observation number. Species The 4-letter code for the common bird names of focal species (all shorebirds and their predators). Refer to table "birdInventory_taxonomy_AKPen_tibbitts_2004_2007.csv" in this data release package for a list of species codes. Author Defined The eBird/Clements Checklist of Birds of the World: v2021 Clements Checklist of Birds of the World. https://www.birds.cornell.edu/clementschecklist/updateindex/august-2021/ Sex Sex of the observed bird(s). Blank cells indicate that the sex was not recorded. Author defined U Unknown sex Author defined M Male Author defined F Female Author defined Time Time since the start of the 10-min bird count until a bird was detected. Blank cells indicate that no birds were encountered during the 10-min bird count or the data was not recorded in the field. Author defined 0:00 9:59 mm:ss Num The number of individuals in a flock that all share the same distance, location, behavior, and vegetation type. If individuals in a flock differ, a new record is added and the two records are linked using the "link" attribute. Author defined The number of individuals in a flock that all share the same distance, location, behavior, and vegetation type. Dist Distance (m) of the bird(s) from the observer at time of detection. Author defined Distance (m) of the bird(s) from the observer at time of detection. Deg The approximate direction of the detected bird(s) within the point count radius. Author defined The approximate direction of the detected bird(s) within the point count radius. Behavior Behavior of bird(s) when first detected during the 10-min bird count. Author defined AC Aerial chase Author Defined AF In air fleeing Author Defined BA Bathing Author Defined CIR Circling Author Defined DD Distraction display Author Defined DF Display flight Author Defined FE Feeding Author Defined FF Flapping flight Author Defined FG Flush from ground Author Defined FI Fight or aggressive interaction Author Defined FL/LA Flying and landing Author Defined FLY Flying Author Defined GC Ground chase Author Defined HU Hunting Author Defined MO Mobbing predator Author Defined PE Perched Author Defined PR Preening Author Defined RO Roost or loafing Author Defined ST Standing Author Defined SW Swim Author Defined TF Taking flight Author Defined WA Walking Author Defined Vocal Vocalization of bird(s) when first detected during the 10-min bird count. Author defined AC Alarm Call Author Defined C Call Author Defined FC Flight call Author Defined SI Silent Author Defined SO Song Author Defined WI Snipe winnow Author Defined Veg The Viereck et al. 1992 vegetation classification at the location of the observed bird(s). This should match vegetation codes in the vegetation classification section of the field data form. Author defined The Viereck et al. 1992 vegetation classification at the location of the observed bird(s). Link Indicates links between the records of distinct birds that were (in some manner) associated or interacting during a 10-min bird count (e.g., a mobbing bird and the predator being mobbed). Blank cells indicate that the bird in this record was not linked to any other birds encountered during the 10-min bird count. Author defined 1 The first set of linked birds detected during a 10-min bird count. Author Defined 2 The second set of linked birds detected during a 10-min bird count. Author Defined 1,2 A bird(s) that was linked to both the first and second set of birds detected during a 10-min bird count. Author Defined 3 The third set of linked birds detected during a 10-min bird count. Author Defined 1st Obs Indicates whether the bird(s) was detected at a different point during a previous 10-min bird count. Cosesponds to the "Previous" attribute in all CSV tables included in this data release package. Author defined Y Yes, bird(s) were detected during a previous 10-min point count. Author defined N No, bird(s) were not detected during a previous 10-min point count. Author defined Measure AV Indicates whether the bird(s) was detected aurally, visually, or both. Blanks indicate that the data were not recorded in the field or no birds were encountered during the 10-min bird count. Author defined A Aural. The bird(s) was heard. Author Defined V Visual. The bird(s) was seen. Author Defined AV Aural Visual. The bird(s) was heard first, then seen. Author Defined VA Visual Aural. The bird(s) was seen first, then heard. Author Defined Reac to Obs Indicates whether the bird(s) reacted to observer presence. Blank cells indicate that the data were not recorded in the field or no birds were encountered during the 10-min bird count. Author defined NR No reaction Author Defined MA Moved away from observer Author Defined MT Moved toward observer Author Defined Notes Place for specific notes about this detection record. Blank cells indicate that no additional information was needed for the record. Author defined Free text for notes. Picture Taken Were habitat photographs taken at the point count location? Author defined Check box indicating if vegetation photos were taken or were not. Abund Other Species The 4-letter bird species codes and distance detected (m) for NON-FOCAL bird(s) detected during each 10-min point count. Author defined The 4-letter bird species codes and distance detected (m) for NON-FOCAL bird(s) detected during each 10-min point count. Non-focal bird species included passerines, ptarmigan and waterfowl species. birdInventory_pointCount_DataForms_AKPen_tibbitts_2005-2007.pdf Digital scans of the original field data forms from 2005-2007 providing environmental information and observational data at the 792 bird point counts completed on the Alaska Peninsula Presented as a PDF file. Author defined Plot Individual identifier of the 5-km x 5-km bird count plots. Corresponds to the "Plot" attribute in other tables included with this data package. The geographic bounding coordinates of the plots are provided in the table "birdInventory_plot_LatLong_AKPen_tibbitts_2004_2007.csv" Author Defined 116 1844 No Units Transect Individual identifier of each transect within each 5-km x 5-km bird count plot. Author Defined Individual identifier of each transect within each 5-km x 5-km bird count plot. Point Individual identifier of each 10-min bird count point. Author Defined Unique identifier: Point number (1-9). Date Date that observers conducted the point count. Author Defined 05-13-04 05-26-04 Date (MM-DD-YY) Time Start time of the bird point count. Recorded to the nearest minute in 24-hour local time (0001-2400 hrs). Author defined 0726 2228 24-hrs Obs Initials of the observer. Author defined Initials of the observer. Rec Initials of the person recording data. Author defined Initials of the person recording data. Sky Precipitation code for the conditions at the start of each bird point count. Author defined 0 Clear of a few clouds Author defined 1 Partly cloudy (scattered) or variable sky Author defined 2 Cloudy (broken) or overcast Author defined 4 Fog or smoke Author defined 5 Drizzle Author defined 7 Snow Author defined 8 Showers Author defined Wind The wind speed indicated by a Beaufort code. Author defined 0 wind speed 0-1 mph, calm; smoke rises vertically National Weather Service 1 wind speed 1-3 mph, light air; direction of wind shown by smoke drift National Weather Service 2 wind speed 4-7 mph, light breeze; small wavelets on waterbody National Weather Service 3 wind speed 8-12 mph, gentle breeze; large wavelets on waterbody National Weather Service 4 wind speed 13-18 mph, moderate breeze; small waves on waterbody National Weather Service 5 wind speed 19-24 mph, fresh breeze; moderate waves on waterbody National Weather Service Slope The slope (degrees) at each point count location using the edge of a compass. Author defined Slope (degrees) at each point count location. Aspect The aspect (direction) of the slope at each point count location. Author defined Aspect (direction) of the slope at each point count location. Obs. Conditions Weather conditions (esp. wind, fog, precipitation) as they affect bird detection during each 10-min bird count. Author defined Good Weather conditions not limiting bird detection (visual or aural) or bird activity. Thus, good visibility, minimal wind, no precipitation. Author defined Fair Weather conditions slightly limiting bird detection (visual or aural) or bird activity. Author defined Poor Weather conditions limiting bird detection (visual or aural) or bird activity. Author defined Percent of Circle The estimated percent cover (to the nearest 5%) of vegetation types and standing water within the 150 m or 50 m vegetation circles. Author defined The estimated percent cover (to the nearest 5%) of vegetation types and standing water within the vegetation circles. NWI Class The National Wetlands Inventory (NWI) habitat classification code of each habitat type within the vegetation circle in the 150 m (open habitat) or 50 m (closed habitat) surrounding each point count location. U.S. Fish and Wildlife Service The National Wetlands Inventory (NWI) habitat classification code. Viereck Class Viereck et al. 1992 vegetation classification codes for a 150 m radius circle surrounding a point count location in open habitats and a 50 m radius circle surround a point count location in forested habitats. A rangefinder was used to determine distances from the observer. Author defined Viereck et al. 1992 vegetation classification code Dominant Species The dominant plant species within each vegetation circle. Author defined The dominant plant species within each vegetation circle. Waypoint Number The waypoint number, latitude, longitude and GPS location error at the marked point count location. Latitude and longitude are provided in decimal degrees (NAD27). The marked point count location is the same as the observer location. Author defined The waypoint number, latitude, longitude and GPS location error at the bird point count location. Observer Number A consecutive observation number. Each point count starts with observation 1. Author defined A consecutive observation number. Species The 4-letter code for the common bird names of focal species (all shorebirds and their predators). Refer to table "birdInventory_taxonomy_AKPen_tibbitts_2004_2007.csv" in this data release package for a list of species codes. Author Defined The eBird/Clements Checklist of Birds of the World: v2021 Clements Checklist of Birds of the World. https://www.birds.cornell.edu/clementschecklist/updateindex/august-2021/ Sex Sex of the observed bird(s). Blank cells indicate that the sex was not recorded. Author defined U Unknown sex Author defined M Male Author defined F Female Author defined Time Time since the start of the 10-min bird count until bird was detected. Blank cells indicate that no birds were encountered during the 10-min bird count or the data was not recorded in the field. Author defined 0:00 9:59 mm:ss Num The number of individuals in a flock that all share the same distance, location, behavior, and vegetation type. If individuals in a flock differ, a new record is added and the two records are linked using the "link" attribute. Author defined The number of individuals in a flock that all shar ethe same distance, location, behavior, and vegetation type. Dist Distance (m) of the bird(s) from the observer at time of detection. Author defined Distance (m) of the bird(s) from the observer at time of detection. Bear The approximate direction of the detected bird within the point count radius. Author defined The approximate direction of the detected bird within the point count radius. Behavior Behavior of bird(s) when first detected during the 10-min bird count. Author defined AC Aerial chase Author Defined AF In air fleeing Author Defined BA Bathing Author Defined CIR Circling Author Defined DD Distraction display Author Defined DF Display flight Author Defined FE Feeding Author Defined FF Flapping flight Author Defined FG Flush from ground Author Defined FI Fight or aggressive interaction Author Defined FL/LA Flying and landing Author Defined FLY Flying Author Defined GC Ground chase Author Defined HU Hunting Author Defined MO Mobbing predator Author Defined PE Perched Author Defined PR Preening Author Defined RO Roost or loafing Author Defined ST Standing Author Defined SW Swim Author Defined TF Taking flight Author Defined WA Walking Author Defined Vocal Vocalization of bird(s) when first detected during the 10-min bird count. Author defined AC Alarm Call Author Defined C Call Author Defined FC Flight call Author Defined SI Silent Author Defined SO Song Author Defined WI Snipe winnow Author Defined Veg The Viereck et al. 1992 vegetation classification at the location of the observed bird(s). This value should correspond to the vegetation classification section on each raw field data form. Blank cells indicate that the vegetation class was not recorded. Author defined The Viereck et al. 1992 vegetation classification at the location of the observed bird(s). Link Indicates links between the records of distinct birds that were (in some manner) associated or interacting during a 10-min bird count (e.g., a mobbing bird and the predator being mobbed). Blank cells indicate that the bird in this record was not linked to any other birds encountered during the 10-min bird count. Author defined 1 The first set of linked birds detected during a 10-min bird count. Author Defined 2 The second set of linked birds detected during a 10-min bird count. Author Defined 1,2 A bird(s) that was linked to both the first and second set of birds detected during a 10-min bird count. Author Defined 3 The third set of linked birds detected during a 10-min bird count. Author Defined Prev Indicates whether the bird(s) was detected at a different point during a previous 10-min bird count. Cosesponds to the "Previous" attribute in all CSV tables included in this data release package. Author defined Y Yes, bird(s) were detected during a previous 10-min point count. Author defined N No, bird(s) were not detected during a previous 10-min point count. Author defined Measure AV Indicates whether the bird(s) was detected aurally, visually, or both. Blanks indicate that the data were not recorded in the field or no birds were encountered during the 10-min bird count. Author defined A Aural. The bird(s) was heard. Author Defined V Visual. The bird(s) was seen. Author Defined AV Aural Visual. The bird(s) was heard first, then seen. Author Defined VA Visual Aural. The bird(s) was seen first, then heard. Author Defined Reac to Obs Indicates whether the bird(s) reacted to observer presence. Blank cells indicate that the data were not recorded in the field or no birds were encountered during the 10-min bird count. Author defined NR No reaction Author Defined MA Moved away from observer Author Defined MT Moved toward observer Author Defined Notes Place for specific notes about this detection record. Blank cells indicate that no additional information was needed for the record. Author defined Free text for notes. Photos The number of each photo type in the order taken. GPS (1-5), north facing (1-5), east facing (1-5), south facing (1-5), west facing (1-5). Author defined The number of each photo type in the order taken. Abund Other Species The 4-letter bird species codes and distance detected (m) for NON-FOCAL bird(s) detected during each 10-min point count. Author defined The 4-letter bird species codes and distance detected (m) for NON-FOCAL bird(s) detected during each 10-min point count. Non-focal bird species included passerines, ptarmigan and waterfowl species. birdInventory_taxonomy_AKPen_tibbitts_2004_2007.pdf Table containing the taxonomic classification of birds observed on the Alaska Peninsula. Presented in a Comma Separated Value (CSV) formatted table. Author defined class Taxonomic hierarchical level; class The eBird/Clements Checklist of Birds of the World: v2021 Taxonomic hierarchical level; class order Taxonomic hierarchical level; order The eBird/Clements Checklist of Birds of the World: v2021 Taxonomic hierarchical level; order family Taxonomic hierarchical level; family The eBird/Clements Checklist of Birds of the World: v2021 Taxonomic hierarchical level; family genus Taxonomic hierarchical level; genus The eBird/Clements Checklist of Birds of the World: v2021 Taxonomic hierarchical level; genus species Taxonomic hierarchical level; species The eBird/Clements Checklist of Birds of the World: v2021 Taxonomic hierarchical level; species common Bird species common name The eBird/Clements Checklist of Birds of the World: v2021 Bird species common name code Unique four-letter code representing the common name of each bird species. American Ornithological Union Unique four-letter code representing the common name of each bird species. U.S. Geological Survey, Alaska Science Center Mailing and Physical

4210 University Drive

Anchorage Alaska 99508 USA 907-786-7000 ascweb@usgs.gov The U.S. Geological Survey, Alaska Science Center is the authoritative source and distributor of these data. Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data for other purposes or on all computer systems, nor shall the act of distribution constitute any such warranty. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. PDF, CSV Data are distributed in a Zip package containing data in PDF and CSV format and FGDC metadata in XML and HTML formats. Compression applied by the 7-Zip utility using the default compression level [5]. The file can be decompressed and unpacked by open source or commercially available unzip tools. https://doi.org/10.5066/P9FR8FLZ None 20220504 U.S. Geological Survey, Alaska Science Center Mailing and Physical

4210 University Drive

Anchorage Alaska 99508 USA 907-786-7000 ascweb@usgs.gov FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata (CSDGM) FGDC-STD-001.1-1999