An adult Cooper's Hawk, a bird similar in size to a Peregrine Falcon, and often mistaken for one. An interesting feature of Cooper's Hawks is that their irises darken with age - beginning as golden yellow, and eventually becoming a fairly deep red. This individual is somewhat intermediate, suggesting an age of approximately 3-4 years (we welcome input from anyone familiar with Cooper's Hawks who feels differently).
(Photo by Joe Milner)
© Canadian Peregrine Foundation