Is the Alfred listing station (not to be confused with "Alfred Station", a nearby hamlet), on Jericho Hill. This would give it significant elevation. Could elevation be a factor effecting 2? Just another thought. By the way. I don't usually post much and there may be others on this list who are passively learning a TON from those who do. Posts and assistance from those on this list are greatly appreciated.
FYI... We have had a few pulses of activity here in Missouri. Generally, more activity has be seen on the ground (mist-netting) and through visual observations. My Fall 2011 NFC placement is horrible (too close to insects of all sorts singing in every frequency range) and I'll be moving it soon. So far we've had steady small numbers of migrants moving through. AHY warblers, tanagers, RBGRs, have been on the move here for the past week. Ethan Ethan C. Duke, Assistant Director Missouri River Bird Observatory website: www.mrbo.org blog: http://mrbohappenings.blogspot.com/ 660.886.8788 On 21 Sep 2011, at 9:19 AM, David La Puma wrote: > Pretty fascinating stuff- since the radar reflectivity did not indicate the > 'largest' flight of the season for NY State, yet the call rates were clearly > highest. The upper-level winds were out of the WSW last night, which may have > caused 1) more birds to compensate for drift and 2) birds to fly at lower > altitude to avoid the effects of the head/side wind. Whether 1 would > influence call rate is unknown to me, but 2 should definitely influence the > detectability of calls. We could test 2 by calculating the vertical profile > of reflectivity for last night and several other of the 'big' nights over the > last month- and see whether there is a significant difference. This would at > least tell us whether the detected call rate had to do with the way we sample > the sky (and the detectability of birds at various altitudes). Knowing the > altitudinal distribution we could then look at the winds aloft to determine > the relative effect (wind aloft from radiosonde balloons vs. actual target > speed and direction derived from the radar) of the wind on flight direction, > and therefore infer whether birds were being pushed off course. I guess > there's a viable 3rd option which is that more immature (and naive) birds are > flying now than earlier in the season, which we would assume would influence > call rate... although I don't know the relative breakdown of adult:immature > in the suite of species moving now (just thinking of Am Redstart is what > conjured the hypothesis). > > Any other thoughts? > > cheers > > David > ________________________ > > David A. La Puma > Postdoctoral Associate > New Jersey Audubon Society > 600 Route 47 North > Cape May Court House, NJ 08210 > Office: 609.861.1608 x33 > Fax: 609.861.1651 > > Teaching/Research Profile: > http://www.woodcreeper.com/teaching > > Websites: > http://www.woodcreeper.com > http://badbirdz2.wordpress.com > > Photos: > http://www.flickr.com/photos/woodcreeper > > > > > > > On Wed, Sep 21, 2011 at 9:55 AM, Bill Evans <wrev...@clarityconnect.com> > wrote: > Ken appears to have tuned into one of the biggest calling night of the season > so far in central NY. The acoustic station at Alfred Station, NY logged its > season high number (988) of warbler and sparrow flight calls last night > between 8:30PM-5:30AM. Based on spectrographic analysis roughly 4 out of 100 > were Common Yellowthroat, 2 out of 100 were Black-throated Blue, and 2 out of > 100 were Chestnut-sided. Also notably in the mix were good numbers of > presumed Lincoln's Sparrow calls. > > Bill E > > > > > > > -- > > NFC-L List Info: > http://www.NortheastBirding.com/NFC_WELCOME > http://www.NortheastBirding.com/NFC_RULES > http://www.NortheastBirding.com/NFC-L_SubscribeConfigurationLeave.htm > > ARCHIVES: > 1) http://www.mail-archive.com/nfc-l@cornell.edu/maillist.html > 2) http://www.surfbirds.com/birdingmail/Group/NFC-L > 3) http://birdingonthe.net/mailinglists/NFCL.html > > Please submit your observations to eBird: > http://ebird.org/content/ebird/ > > -- > > -- > NFC-L List Info: > Welcome and Basics > Rules and Information > Subscribe, Configuration and Leave > Archives: > The Mail Archive > Surfbirds > BirdingOnThe.Net > Please submit your observations to eBird! > -- -- NFC-L List Info: http://www.NortheastBirding.com/NFC_WELCOME http://www.NortheastBirding.com/NFC_RULES http://www.NortheastBirding.com/NFC-L_SubscribeConfigurationLeave.htm ARCHIVES: 1) http://www.mail-archive.com/nfc-l@cornell.edu/maillist.html 2) http://www.surfbirds.com/birdingmail/Group/NFC-L 3) http://birdingonthe.net/mailinglists/NFCL.html Please submit your observations to eBird: http://ebird.org/content/ebird/ --
