Hi Benjamin, Both of these calls sound fine for Least Bittern to me. Just a little variation.
Best, Michael Michael O'Brien Victor Emanuel Nature Tours www.ventbird.com On Jun 24, 2011, at 7:22 AM, Benjamin Van Doren <nimajn...@gmail.com> wrote: > Hi all, > > I recorded the attached two calls in Rye, NY (along the coast of > Long Island Sound) this past spring. The first (LEBI. > 20110524.030445.28.wav) is a typical Least Bittern flight call, > while the second (LEBI poss.20110524.030425.48.wav) is a different > call, recorded 20 seconds before the first. It doesn't really sound > like Least Bittern, but, spectrographically, it has a similar arched > shape and is exactly the same length, so I am thinking that perhaps > it is a different call of that species, one that I haven't seen > described before. Again, to the ear it does not sound like a typical > Least Bittern call at all, but the close temporal proximity between > the calls and their apparent spectrographic similarities (which > could, of course, just be superficial) got me thinking that maybe > it's a variant flight call of that species. This microphone has > recorded seven Least Bittern calls this spring, conservatively of 4 > individuals, and spread out over the migration season (4/30, 5/9, > 5/24, 5/31), which I think is interesting on a couple levels. > > If anyone has heard/recorded this call (LEBI poss. > 20110524.030425.48.wav) before from a Least Bittern (or a different > species!), feel free to chime in. All thoughts welcome. > > Good listening, > > Benjamin Van Doren > > > -- > 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! > -- > <LEBI.20110524.030445.28.wav> > <LEBI poss.20110524.030425.48.wav> -- 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/ --
