Gallery: Photography Identifying Difficult Species: Joshua Callman Nuttall's Woodpecker Identifying Similar Behavior: Bruce Finocchio Anna's Hummingbird (male) Allen's Hummingbird (female) Identifying Spectacular Species: Tom Grey Cooper's Hawk White-tailed Kite Identifying Similar Species: Peter LaTourrette Violet-green Swallow Tree Swallow Identifying Spectacular Species: Carlos Rodriguez-Lluesma Great Blue Heron Red-shouldered Hawk Identifying Spectacular Species: Diana Rogers Red-tailed Hawk Identifying males and females when they do not look alike: Gary Siftar American Kestrel (female) American Kestrel (male) BACK