Movie 2.

Video footage illustrating the process of habituation to the testing device. As the raccoon approaches the testing device, her PIT tag is detected, and the device automatically releases a food reward. The raccoon reacts by swiftly moving away from the device, but after a moment she returns to collect the food reward. Upon detection of her PIT tag again, the device releases a second food reward. This time the raccoon reacts by flinching at the sound of the device activating, but does not move away from the device as she did before. Finally, the device releases a third reward and although the raccoon flinches again, it appears less than her previous reaction.

Environmental, individual and social traits of free-ranging raccoons influence performance in cognitive testing

Lauren A. Stanton, Eli S. Bridge, Joost Huizinga, and Sarah Benson-Amram

Journal of Experimental Biology 2022. 225:None-None; doi: 10.1242/jeb.243726