Fig. 1.
From: Open questions: Tackling Darwin’s “instincts”: the genetic basis of behavioral evolution
Evolving behaviors. Examples of genetically defined behaviors that differ between closely related species. Top: Differences in the use of wing “rowing” in the male courtship routine of drosophilid species, illustrated by chronophotography [17]. Bottom: Differences in burrow construction between Peromyscus deer mice species [10] (image credit: Brant Peterson and Hopi Hoekstra)