What happens when related species interact? Can their behavioral interactions influence their evolution and ecology? Dr. Greg Grether and other members of his lab in UCLA's Department of Ecology and Evolutionary Biology address these questions in their research. They have coined the term "agonistic character displacement" to describe a seldom-studied evolutionary process by which fighting between species drives the evolution of traits that mediate species interactions. In this video, Grether discusses some recent work on rubyspot damselflies conducted by Grether and Dr. Chris Anderson.

Produced by Neil Losin / Day's Edge Productions

Photos by Greg Grether, Patrick Green, Andrew Chao, J. P. Drury, and Chris Anderson

Video footage by Greg Grether

Music by Dan Warren (danwarren.net)

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