Thayer Birding Software THA7 Thayer's Birds of North America Version 7 USB Flash Drive Windows Edition 985 birds of North America with 6,500 Photos, 1,500 Songs, 550 Videos and 700 Quizzes This is the latest edition (2015) and all other versions are obsolete. Identify unknown birds with the ID Wizard - enter color, location, size, habitat and more then see the birds that match your description! Make your Own Quizzes and Screen Savers. Record your Sightings and print out a Life List. Includes The Birder's Handbook in electronic format. Use Side-by-side comparisons to compare similar species.