Yesterday with the help of my friend John West we conducted
a nesting survey during our volunteer morning at the Salem Audubon Nature Reserve. Last winter and spring I had helped construct
artificial nesting cavities in some large oak limbs that were then buried
upright in the ground. By April we had
ten of these in place and began the waiting game. During the following months we saw some
interest and activity at four different nest sites, and one repeatedly was
visited by a pair of Black-capped Chickadees to the point we were sure there
was a nest being constructed. We have not seen any activity for a long time and
I was confident that it was late enough in the season that we could open up the
cavities and make an inspection without interrupting any nesting birds. What we
found is as follows. Five of the sites
showed no evidence of use at all. One
site contained some bird poop and a couple of feathers suggesting that it had
been used only for roosting. Two sites
had enough material to suggest that nests had been started. Two sites had complete nests with eggs but
had clearly been abandoned. In the photo above I am shown at site # 4 which had
four eggs buried in the bottom of the nest, topped off with twigs, feathers and
hair compacted with debris and bird poop.
The second location with eggs, which was site #10, contained four or
five broken eggs. The photo below is of
the four eggs that came from sight #4.
Thursday, August 7, 2014
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