Summary of second-order Akaike information criterion (AICc) results for models testing the relationship between cat age, sex, and hunting environment, and the effectiveness of the Birdsbesafe collar cover for preventing kills of all prey types during three spring-season studies in New York (2014 and 2019) and Florida (2019). K is the number of parameters in each model. Willson et al. (2015) previously reported the 2014 data.