This file describes three datasets used to evaluate individual traits in brown treesnakes and how they affect susceptibility to toxicant applications. This file references three data sets that include 'Guam GROUND', SURVTOX', and 'HMU NWFN TRT.' Guam GROUND reference to snakes encountered during visual surveys on Guam and whether they were located on the ground or arboreal. SURVTOX refers to a known fate study of telemetered snakes that either survived or died during an application of toxic baits. HMU NWFN TRT refers to the demography of snakes captured pre and post-toxicant treatment. The specific details of toxicant treatments and survey methods are described in the associated manuscript: Nafus et al. 2019. Behavior, size, and body condition predict susceptibility to management and reflect post-treatment frequency shifts in an invasive snake. Global Ecology and Conservation: 21: e00834.