Project FeederWatch 对比 Raptor ID 的使用情况和统计数据

The first raptor identification app designed for mobile devices; "HawkWatch International's Identification Guide to Raptors" puts expert hawk identification content in the palm of your hand. In this guide to North America's 34 species of diurnal raptors, you'll find nearly 1000 annotated photos, and cutting edge identification video for each species, geared toward helping you identify raptors in flight. If you're just getting started with birding, this app covers the basics; if you're already an expert hawk watcher, this app covers all the variation that can lead to identification confusion, even among the most seasoned birders. • Developed by HawkWatch International in partnership with the Cornell Lab of Ornithology • Comprehensive identification content created by Jerry Liguori and Brian Sullivan • ~1000 annotated photos covering plumage, age/sex, and geographic variation • Cutting edge ID-focused video showing each species in flight, including voice-over ID tips from Jerry Liguori • Range maps with links to interactive seasonal eBird maps • Vocalizations for each species • 'Ask the authors' raptor ID question forum