After reviewing the OBRC checklist, it appears that red-eyed, blue-headed and yellow-throated vireos, all of which have similar songs (the latter of which is the most distinctive of the three), have the same seasonal occurrence and abundant graphs for the month of April. (See link below).
http://www.ohiobirds.org/publications/OBRClist.pdf
David A. Brinkman
Master of Education, Xavier University
Cincinnati, OH
________________________________
From: David Brinkman <[log in to unmask]>
To: "[log in to unmask]" <[log in to unmask]>
Sent: Friday, April 12, 2013 10:31 AM
Subject: Rescinding Red-eyed Vireo ID from yesterday at Winton Woods Settling Pond
Dear Ohio,
I'm rescinding my red-eyed vireo report and relegating it to vireo sp. in e-bird. This is due to only hearing it once. I was hasty in my ID of red-eyed. Usually during spring migration I bird under the assumption that all similar sounding vireos are red-eyes until proven otherwise. In the past I've been able to correctly ID blue-headed and Philadelphia songs by tracking down the birds and getting visuals on them. However, the vireo I heard yesterday only sang once and the flag by e-bird should have been an alert to me that something was amiss in my report. I guess I thought that an early red-eyed vireo would not be entirely out of the question. During the height of spring migration, the laws of probability would indicate that most of the vireos heard in southwest Ohio are red-eyeds. But this is not the height of spring migration. This is early to mid-April, a time when vesper sparrows and ruby-crowned kinglets are more likely to be found but more
difficult if not impossible to get on the bird-a-thon in the second weekend of May. It is also a time when blue-headed vireos are coming through and, as I've now realized, red-eyeds have not yet arrived.
Lesson learned.
Thanks,
David
David A. Brinkman
Master of Education, Xavier University
Cincinnati, OH
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