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June 13, 2010

Take-out in the rain

This morning, I saw this hawk eating another bird in the rain near Marshdale Colorado. This is about 8,000 ft above sea-level in the foothills of the Rocky Mountains. It has been raining steadily for about a day or so, and the hawk is soaking wet. I'm not sure what type of hawk this is. The hawks I most frequently see up here this time of year are Red-tails and possibly Swainson's hawks. This bird appears to have prominent tail banding and a reddish-brown eye.

Juvenile Red-tails have prominent tail banding, but their eyes are yellow when they're young, and I don't see a prominent belly band. So, I'm thinking this is a mature hawk, but not a Red-tail. Possibly a Swainson's?

Update: This is a Cooper's hawk. :)

Update 2: Bob Cohen elaborates - "From the shape (relatively slim, small-headed and long-tailed), it's an accipiter rather than a buteo, so it's not either a Red-tail or a Swainson's. So, the possibilities are Goshawk, Cooper's, and Sharp-shinn. The ventral (underside) orange barring, most visible in this photo on the flanks, rules out a Goshawk. The relatively light-colored nape (back of neck) indicates that it's a Cooper's rather than a Sharp-shinn. Also, compared to Cooper's, Sharp-shinn is even smaller-headed and smaller-beaked, which doesn't agree with your photo."

Update 3: Poor Matty adds - "The length of the tail is a very good thing to look for. Most Buteos don't have a tail that extends very far past their primaries when the bird is perched, if it extends past them at all. Accipiter tails on the other hand are always quite a bit longer. Also, in adult birds, the bluish back is a good mark for an Accipiter. Most Buteos (though there are some exceptions) are brown above. Of course, immature Accipiters are also brown on the upperparts."

http://www.whatbird.com/forums/forums/163299/ShowThread.aspx#163299

Posted by Rob Kiser on June 13, 2010 at 11:33 AM

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