About us: We own the Wild Birds Unlimited nature shop in East Lansing, Michigan,
a store that provides a wide variety of supplies to help you enjoy the birdwatching hobby.

This blog was created to answer frequently asked questions & to share nature stories and photographs.
To contribute, email me at bloubird@gmail.com.

Wednesday, February 15, 2017

#GBBC: Sharp-shinned and Cooper's Hawk

Sharp-shinned (Accipiter striatus) and Cooper’s (Accipiter cooperii) hawks can be hard to ID. The birds have a lot of variation in plumage and size and there is no single field mark that distinguishes one species from the other.

Size is one defining factor, but that’s sometimes hard to judge with a single bird. The rule of thumb is that a Cooper’s Hawk is about the size of an American Crow and the Sharp-shinned Hawk is more the size of a jay.

Get to know the Sharp-shinned and Cooper's Hawk before The Great Backyard Birdcount (#GBBC)

The following are ID tips from Project Feeder Watch for the Sharp-shinned Hawk and Cooper's Hawk:

1) The tail feathers of Sharp-shinned Hawks appear squared with a notch in the center, whereas a Cooper's Hawks tail looks rounded.
Cooper's Hawk
2) Cooper's Hawks have a barrel shaped chest. Sharp-shinned Hawks are widest at the shoulder and get distinctly narrower down to the hips.
3) A Sharp-shinned Hawk's head looks small compared to the body, and a Cooper's Hawk's head looks large.
4) Cooper's Hawks are usually larger than Sharp-shinned Hawks.
5) A juvenile Sharp-shinned Hawk has very thick, rufous stripes that extend down the lower belly while the Cooper's Hawk has very thin, dark vertical streaks that fade away on the lower belly.
6) Sharp-shinned have very thin toes and legs, compared to the Cooper's Hawk.
7) The color of the nape of an adult Cooper's Hawks is pale with a clear contrast to a dark cap. Juveniles of both species can show a pale nape, however.

More identification tips and challenges can be seen on Project Feeder Watch's Accipiter Photo Gallery page: http://www.birds.cornell.edu/pfw/AboutBirdsandFeeding/accipiterphoto.htm 

Related Articles:
Participate in the Great Backyard Bird Count http://GBBC.html
Coopers's Hawk http://bit.ly/ylsupp
Hawks at Feeders http://bit.ly/zfOiVV
Sharp-shinned Hawks http://bit.ly/zhi4Ng

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