Re: [CVBirds] Yolo Dark morph RLHA yes, Harlan's no

John Sterling <ani@...>


Thanks for clearing up that report. I suspect that many reported dark
Harlan's Hawks in the Central Valley are actually dark Rough-legged Hawks.
It is a tricky identification, so no one should feel badly about getting
crossed up. Because we don't see many dark Rough-leggeds in CA, most
birders are not as familiar with that form as with other raptors. Even with
this in mind, dark Rough-legged Hawks greatly outnumber dark Harlan's Hawks
in California. One should be cautious when reporting the much more rare
Harlan's Hawk. It is a great learning experience to thoroughly document a
Harlan's Hawk in California.


John Sterling

26 Palm Ave

Woodland, CA 95695

530-908-3836 (cell)

530-753-3733 ext 102 (work)


From: central_valley_birds@...
[mailto:central_valley_birds@...] On Behalf Of Adamson, Roger
Sent: Wednesday, November 07, 2007 8:52 AM
To: central_valley_birds@...
Subject: [CVBirds] Yolo Dark morph RLHA yes, Harlan's no

I checked for the reported Harlan's Red-tailed Hawk this morning with
Jonathan and we were able to be certain that the bird he had yesterday
was the Dark-morph Rough-legged Hawk. So, NO Harlan's. But the Dark
RLHA is a good bird for study! It was between 0.5 and 1 mile north of
Rd 29 on the west side of Rd 96 between 7 and 8:30 this morning.

Roger Adamson

Davis, California

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