Hi everyone,
I just wanted to pass along some additional information about the Red
Crossbill at Governor Bridge Natural Area in Prince George's County. I
sent the recording off and heard back from Matt Young at Cornell, he said
the bird sounded perfect for a Type 3 Red Crossbill. Matt also mentioned
that there are only a few recordings of type 3's from south of Pennsylvania
and they came from the finch super-flight of 1997-98. I was able to make a
spectrogram and actually got some nice results (despite the poor
recording!) showing the typical type 3 call. If Red Crossbills do become
more regular in the coming months, and I hope they do, it would be great to
try and get recordings of them so we can document the types involved; as
you can hear from my recording, even the really bad ones can contain
valuable information. One thing that I have tried to remember is to have
my recording app on any time I am in the field, if I had done this when the
crossbill flew over the other day, I would not have had to wait for it to
boot up, and could have gotten much better recordings.
A link to the spectrogram-
http://www.flickr.com/photos/mikeycerw/
A few good resources on crossbill types-
http://ebird.org/content/ebird/news/introduction-to%20crossbill-vocalizations
http://madriverbio.com/wildlife/redcrossbill/
http://www.sibleyguides.com/2010/09/red-crossbill-call-types-act-like-species/
Good Birding!
Mikey
Mikey Lutmerding
Croom, MD
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