I didn't receive any other responses to my question from other Ohio Birds list folk, so I guess you are right. Since no one else seems to have noticed a preponderance of black throated green warblers this fall, it must have been a local phenomenon. My best guess is that the migrant warbler species represented must have been affected by my being in a hemlock gorge. As far as we know, the hemlock association and gorge's microclimate are not significant enough to attract typical hemlock breeding species like Mohican Gorge does. I didn't think that our forest composition would have that great an effect on migrant species composition. This could be an interesting line of research. Thanks, Bruce Lombardo Highlands Nature Sanctuary [log in to unmask] ----- Original Message ----- From: "Paul Gardner" <[log in to unmask]> To: "Bruce Lombardo" <[log in to unmask]> Sent: Monday, October 15, 2007 7:44 AM Subject: Re: Black-throated Green Warbler Boom? > I don't think anyone else > has noted an overabundance of black-throated green warblers this fall. The > numbers in your patch was probably a localized thing that we don't > understand > yet. > > Cheers, > Paul > >> > >> > --- Bruce Lombardo <[log in to unmask]> wrote: >> > >> >> The fall wood-warbler migration seems about over here at the Highlands >> >> Nature >> >> Sanctuary in southern Ohio. The big mixed species warbler flocks have >> >> departed and only a few stragglers are passing through. The mixed >> >> species >> >> flocks are now dominated by kinglets. >> >> >> >> But I noticed this fall that about 50% of the warblers I observed were >> >> black-throated green warblers. I am recently returned to Ohio and this >> >> is >> >> my >> >> first fall migration here in over two decades. Is this normal, or was >> >> this a >> >> boom year for black-throated greens? >> >> >> >> Bruce Lombardo >> >> Highlands Nature Sanctuary >> >> [log in to unmask] >> >> >> >> ______________________________________________________________________ >> >> >> >> Ohio-birds mailing list, a service of the Ohio Ornithological Society. >> >> Our thanks to Miami University for hosting this mailing list. >> >> Additional discussions can be found in our forums, at >> >> www.ohiobirds.org/forum/. >> >> >> >> You can join or leave the list, or change your options, at: >> >> http://listserv.muohio.edu/scripts/wa.exe?LIST=OHIO-BIRDS >> >> Send questions or comments about the list to: [log in to unmask] >> >> >> > >> > >> > Paul Gardner >> > Columbus, OH >> >> > > > Paul Gardner > Columbus, OH ______________________________________________________________________ Ohio-birds mailing list, a service of the Ohio Ornithological Society. Our thanks to Miami University for hosting this mailing list. Additional discussions can be found in our forums, at www.ohiobirds.org/forum/. You can join or leave the list, or change your options, at: http://listserv.muohio.edu/scripts/wa.exe?LIST=OHIO-BIRDS Send questions or comments about the list to: [log in to unmask]