http://earbirding.com/blog/archives/1872
http://madriverbio.com/wildlife/redcrossbill/
All,
A couple links to Crossbill song, the earbirding blog is sort of a
review of the madriver site. The madriver site is not an easy read, the
subject is complex.
Gerald White, Muscatine
On 7/30/2012 4:51 PM, Jacob Newton wrote:
I wonder if these are a western subspecies, possibly escaping heavy
fire activity in the western conifer forests, has anyone been able to
voice type them yet?
On Mon, Jul 30, 2012 at 4:13 PM, James Fuller <[email protected]
<mailto:[email protected]>> wrote:
Hi All,
The three recent reports of Red Crossbills in the state has been
most interesting in light of an invasion of
Red Crossbills in the summer of 1996. At that time, the earliest
report was from July 13-14 of ten birds near Iowa City, and
the last report was from Humboldt County on August 25. During the
intervening period there were an
additional 27 reports to the Iowa RBA, and five more came in as
seasonal field reports. Almost all these reports were of birds
visiting sunflower and niger feeders. Thus, there may be more
sightings to come in 2012. An article outlining "A Summer
Invasion of Red Crossbills" can be found in the annals of Iowa
Bird Life, Fall 1998, Volume 68, Number4, Page 135.
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