Bird Identifier is a free Android app developed by World Info that provides a clear guide to identify more than 500 birds. The app is designed with an extensive set of selection criteria that makes it easy to determine which bird is observed. The search criteria include color and shape of head, legs, body, wing, and tail. With its user-friendly interface, it is easy to navigate and find the bird you are looking for.

The app not only provides a comprehensive guide to bird identification but also offers six knowledge quizzes that test your bird's knowledge. The quizzes are both entertaining and educational, making it an excellent resource for bird enthusiasts and beginners alike. Overall, Bird Identifier is a great app that provides a comprehensive guide to identifying birds with a user-friendly interface and entertaining quizzes.