Candidate models, number of parameters (K), ΔAICc, Akaike weight (wi), and log-likelihood (LL) for evaluating the role of study area (Adobe Town, Conger, Frisco, Lake pleasant, and sinbad herd management areas), species (horse or burro), distance of the observer from theanimals, observation quality code (obs code), body condition (BC), year, season, and which side of the animal’s neck was seen (one side, both sides, no sides) for individual physical effects observed among feral horses and burros in the western United States between 2016 and 2020.