[TN-Bird] Re: Blue Grosbeak nest with Cowbird egg?
- From: "Charles P. Nicholson" <cpnichol@xxxxxxxxxxxxx>
- To: drbirdsong4@xxxxxxxxxxx, tn-bird@xxxxxxxxxxxxx
- Date: Fri, 3 Jun 2011 04:41:39 -0700 (PDT)
Yes, this is a Blue Grosbeak nest with 2 grosbeak eggs and 1 cowbird egg.
The most common grosbeak clutch is 4 eggs, so it is possible that either the
cowbird threw out a grosbeak egg or 2 when she laid her eggs, or the
grosbeak was still laying.
There are not very many Blue Grosbeak nest records from Tennessee, and at the
time I compiled the Atlas of the Breeding Birds of Tennessee, I could only find
2 records of cowbirds parasitizing Blue Grosbeaks. Could you please send me
the
date of this photo and, if different, the date you first observed the nest?
And
if you have the opportunity to check on the nest every 2 or 3 days, the dates
the eggs hatch, number of nestlings, fledgling dates, etc. And once the birds
are through nesting, a measurement of the height of the nest above ground. All
of this information will help increase our knowledge of this bird in Tennessee.
Thanks,
Chuck Nicholson
Norris, TN
________________________________
From: Duane Rice <drbirdsong4@xxxxxxxxxxx>
To: tn-bird@xxxxxxxxxxxxx
Sent: Wed, June 1, 2011 7:12:54 PM
Subject: [TN-Bird] Blue Grosbeak nest with Cowbird egg?
Greetings,
Please confirm for me, what I believe to be a Cowbird egg in a Blue Grosbeak
nest.
The nest is located along my fence line.
Thanks,
Duane Rice
Tri-County Corners ( Cheatham/Montgomery/Robertson)
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