Observations of the fit of radio collars on the necks of free-roaming feral horses and burros relative to body condition score, in five populations in the western United States, USA.

Data were collected between 2016 and 2020; results are pooled by species. Note that collars could be observed not fitting correctly on one observation, then fitting correctly the next time seen; all individuals were observed at least once with a correctly fitting collar and only a small subset were observed on a few occasions with an incorrect fit. Asterix (*) denotes inability to calculate standard deviation with only 2 observations of 2 horses, one of which had no body condition recorded.