Contents

18 February 1977
Vol 195, Issue 4279

About The Cover

Iguanas emerging from their nest hole in a communal nesting site on Slothia islet off Barro Colorado Island, Canal Zone, Panama. Hatchling iguanas engage in considerable social behavior and move about in small groups. Animals from different holes often synchronize nest emergence, displays, and movements. See page 689. [J. A. Carter, University of Oklahoma, Norman]