[Bristol-Birds] Copper's Hawk nestlings 7-10 days of age.

  • From: "Wallace Coffey" <jwcoffey@xxxxxxxxxx>
  • To: "Bristol-birds" <bristol-birds@xxxxxxxxxxxxx>
  • Date: Wed, 18 Jun 2008 19:30:27 -0400

Evidence now suggests that the nesting Cooper's Hawks 
at our home in Bristol Tennessee have young about 
7-10 days of age.

If the determination is correct,  eggs were laid during the first 
week of May or by Mother's Day Weekend.  The nest 
probably has about four young because the species lays three 
to six eggs.  Eggs would have been laid every other day.
She most likely began incubation with the third egg and not 
the first.  Incubation usually take as much as 30-32 days.

Today, for the first time,  the vegetation beneath the nest is
becoming noticeably speckled with whitewash, indicating the
young are old enough to stand with their backs at the edge
of the nest and defecate over the side.  This is the evidence
on which the timeline is projected for this nest.  Only one or 
two tiny and suggestive splashes had been seen previously.

If these projections are nearly correct,  the nestlings are 
about 25 to 30 percent thru their daily development stage
until they fledge at about 4 1/2 weeks.

Let's go birding.....

Wallace Coffey
Bristol, TN







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  • » [Bristol-Birds] Copper's Hawk nestlings 7-10 days of age.