If you will be birdwatching in Southeastern Arizona, this is the field guide you will need. This not only covers the birds that Southeast Arizona is famous for, it also includes the Mexican vagrants. This area in Arizona is known for its sky islands and so the book has color coded elevation charts to help with identification. Most of the 600 color photographs are by local photographers. With over 410 species, this is a book you will use whether you are a beginning birdwatcher or an expert. We live in Portal, Arizona and know how helpful this field guide is to us.