As usual, I must second Ted's thoughts. Nasty is right about this complex - Mike Lanzone and I recorded flight calls of Black-headed Grosbeak, Western Tanager and Bullock's Oriole in Arizona in 2005, and the variation was staggering. On subsequent (and previous actually) trips to the SW, I recorded and heard on several occasions a suite of additional calls. Clearly much more work to do here! Plus, what do any of you know about Hooded/Scott's flight calls? I presume that they exist. . .just not aware of having heard them myself.
Thanks for clarifying about the recordings as well, Ted. Sorry Nathan! On Fri, Aug 21, 2009 at 08:55, Ted Floyd<tfl...@aba.org> wrote: > Good stuff, Andrew! > > A few things: > > 1. "Ted's clips" of Brewer's Sparrows are actually Nathan Pieplow's. > > 2. Interesting to compare Andrew's observations in Catron County, NM, > with observations from "up north" in Colorado. Pretty convergent, on the > whole, I would say. > > 3. Andrew says "presumed" Bullock's Oriole. Yeah, no kidding. It's got a > nasty suite of flight calls, some of which approach (overlap with?) > Western Meadowlark. By and large, I do not hear (presumed) Bullock's on > nocturnal migration in Colorado. Then again, Bullock's is our > molt-migration poster-child, with migrants dispersing before the summer > solstice! My impression is that they wander the Colorado grasslands > during the hot daytime hours in June and July. But by mid-August, and > down in New Mexico, they may be doing more of the nighttime thing. > > 4. Western Tanager. That's another nasty one. A few years ago, Will > Russell alerted me to a variant that is basically indistinguishable from > Swainson's Thrush. Also, the WesternTanager/BlackHeadedGrosbeak nexus is > nasty. > > Best, > Ted > > P.s. Good dawn flight audible outside my window right now. Spizellas. > > > > > -----Original Message----- > From: bounce-4189561-9667...@list.cornell.edu > [mailto:bounce-4189561-9667...@list.cornell.edu] On Behalf Of Andrew > Farnsworth > Sent: Thursday, August 20, 2009 4:46 PM > To: email@example.com > Subject: [nfc-l] Night Flight, Catron County, New Mexico 18-19 August > 2009 > > Hi all, > I was in western New Mexico for a brief but eventful visit from 17-19 > August 2009. The birding highlight was almost certainly (large Pinyon > Jay flocks is a close top highlight too) the nice nocturnal flights on > the evening of 18 August continuing into the morning of 19 August near > Quemado, NM in the high desert at approximately 7,200 ft. Conditions > were suprisingly calm, and amazingly clear. At times in the hours just > before sunrise, and before civil twilight, I was hearing 3-4 calls per > minute. Most of the species composition was spizellid, with many > Chipping Sparrows and presumed Brewer's Sparrow (based on previous > recordings that I've reviewed from my own diurnal collections, Ted's > clips, and those diurnal recordings that Lanzone and I made in spring > 2005 in AZ). Also moving in the nocturnal flight were Wilson's Warbler, > Yellow Warbler, Lark Sparrow, Western Tanager, presumed Bullock's > Oriole, Passerina bunting and a suite of unidentified 5+ kHz calls that > were probably emberizids. There was also a small, visible morning > flight, including Bullock's Oriole (two birds giving flight calls) and > many sparrows, including decent numbers (50-60 per hour) of Brewer's > Sparrows (many birds giving flight calls). This flight also included a > nice movement of hummingbirds, including numerous Broad-tailed and > Rufous Hummingbirds (no birds, not surprisingly, giving flight calls). > > Best, > Andrew > > -- > NFC-L List Info: > http://www.NortheastBirding.com/NFC_WELCOME > http://www.NortheastBirding.com/NFC_RULES > > http://firstname.lastname@example.org/maillist.html > -- > > -- > NFC-L List Info: > http://www.NortheastBirding.com/NFC_WELCOME > http://www.NortheastBirding.com/NFC_RULES > > http://email@example.com/maillist.html > -- > -- NFC-L List Info: http://www.NortheastBirding.com/NFC_WELCOME http://www.NortheastBirding.com/NFC_RULES http://firstname.lastname@example.org/maillist.html --