Microevolutionary change in mimicry? Erosion of rattling behaviour among nonvenomous snakes on islands lacking rattlesnakes

Bradley Allf, Amanda Sparkman & David Pfennig
Batesian mimics––harmless species that converge on the warning signals of a dangerous species––are spectacular examples of adaptation, but few documented cases involve acoustic signals. Even fewer studies have documented microevolutionary change in mimicry of any kind. Here, we describe potential evolutionary change in acoustic mimicry. Many nonvenomous snakes vibrate their tail tip when threatened, making a sound resembling a venomous rattlesnake. When we compared this behaviour between gopher snakes from mainland California where rattlesnakes are...
1 citation reported since publication in 2019.
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