Chipmunks have distinct distress calls; one for when they detect an aerial predator, like a hawk, and another for a land predator. Some chipmunks, she said, would squeal all the time. “Some guys would be eating seeds, and a leaf falls on the ground. They panic and they make a call,” she said, screaming their little heads off about an imagined bird of prey. Those were the shy ones. “Some guys just keep foraging.” When she controlled for sex, social status, and age, there were still distinct differences in chipmunks’ personalities that remained stable over time.
