These data are from a study of wild horses and burros wearing radio collars in a captive facility in Oklahoma, USA, for one year. We also evaluated radio transmitter tags (braided into the mane and tails of horses but not burros). We recorded behavior, body condition score, and effects of collars on the necks of horses and burros wearing radio collars and of horses and burros not wearing collars (controls), and recorded any behavioral effects from small radio transmitters on the mane and tails of horses to evaluate effects. These data provide recorded results of behavior, body condition score, and any physical neck effects from radio collars, during weekly and monthly monitoring sessions from February 2015 to March 2016.