Re: [cobirds] Boulder surprising hawk kill

Sharpies take Eurasian Collared-Doves on a regular basis. The dove is almost 50% larger than the hawk by mass. This brings up a question: why are there not more Sharp-shinned Hawks around? There must be more influential constraints on the hawks population than winter food supply. Any thoughts on what those constraints might be?

Nick Komar 

Fort Collins CO

Sent from my iPhone

On Feb 27, 2015, at 9:29 AM, David Waltman <djwaltman@comcast.net> wrote:

I just witnessed a Sharp-shinned Hawk successfully kill a Steller's Jay.  It's sitting on the ground eating the jay right now.  The Steller's Jay is about the same size as the hawk, although the Sharp-shinned would outweigh the jay at about 5 oz. vs.3.7 oz.  I'm amazed that a Sharp-shinned Hawk would go for a bird that large.

David Waltman

Boulder County foothills, 1/2 between Boulder and Lyons

--
You received this message because you are subscribed to the Google Groups "Colorado Birds" group.
To unsubscribe from this group and stop receiving emails from it, send an email to cobirds+unsubscribe@googlegroups.com.
To post to this group, send email to cobirds@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/cobirds/1558816715.19306476.1425054599681.JavaMail.zimbra%40comcast.net.
For more options, visit https://groups.google.com/d/optout.