Autor: George L. Armistead

George L. Armistead is events coordinator at the American Birding Association and a research associate in the Ornithology Department at the Academy of Natural Sciences of Drexel University. He has led birding tours on all seven continents. Brian L. Sullivan is e Bird program codirector and photographic editor for Birds of North America Online at the Cornell Lab of Ornithology. He is the author of numerous papers on bird identification and the coauthor of The Crossley ID Guide: Raptors and Offshore Sea Life ID Guide: West Coast (both Princeton).