David Forum Role: ParticipantActive Since: December 26, 2017Topics Started: 0Replies Created: 1 Profile Topics Started Replies Created David's Courses Be a Better Birder: Duck and Waterfowl Identification Ornithology: Comprehensive Bird Biology Be a Better Birder: Sparrow Identification The Wonderful World of Woodpeckers Be a Better Birder 1: Size and Shape Be a Better Birder 2: Color and Pattern Bird Song Basics: Getting Started with Birding by Ear Be a Better Birder: Warbler Identification eBird Essentials Anything but Common: The Hidden Life of the American Crow The Wonderful World of Owls Be a Better Birder: Hawk and Raptor Identification