Brian L. Sullivan is Birds of the World project lead at the Cornell Lab of Ornithology and cocreator of the groundbreaking Raptor ID app. His books include Better Birding (Princeton). Michael O'Brien is a tour leader for Victor Emanuel Nature Tours and creator of Larkwire, an app for learning bird sounds. His books include The Shorebird Guide. Christopher Wood is program director of the Center for Avian Population Studies and director of the eBird project at the Cornell Lab of Ornithology. Steve N. G. Howell is an international bird tour leader with WINGS and research associate at the California Academy of Sciences and Point Blue Conservation Science. His books include Birds of Belize (Princeton). Ian Lewington is widely recognized as one of the world's most accomplished bird illustrators. His books include (with Steve N. G. Howell and Will Russell) Rare Birds of North America (Princeton). Lorenzo Starnini is an Italian wildlife illustrator who has collaborated with international journals, universities, and government and research institutions on a broad range of projects.