Hi, all, I also noticed the bend at the beginning as Paul did, and considered VESP. Looking at a few sources, though, it seems that VESP tends to show more fine modulation after that initial bend. The call also has a secondary bend that falls in line with that of WCSP. This structural detail, paired with measurements and location would make WCSP my best guess.
I think I've recorded a similarly structured call before, which I ID'd as a WCSP: https://macaulaylibrary.org/asset/37000681#_ga=2.24609016.332648672.1508037146-1992354132.1467939179 Not sure how to rule out an aberrant CHSP call from Geoff's recording, but possibly worth considering, though it would be on the short end. Best, Gates Dupont On Sun, Oct 15, 2017 at 9:19 PM, <pjd...@aol.com> wrote: > Hi Geoff, > > Another species to consider is Vesper Sparrow. Your call has the hockey > stick start to the spectrogram that is typical for Vesper and separates it > from White-crowned. > > At 74ms it is long for a Clay-colored. > > Paul Driver > > > -----Original Message----- > From: Geoff Malosh <pomar...@earthlink.net> > To: NFC-L <nf...@cornell.edu> > Sent: Sat, Oct 14, 2017 4:50 pm > Subject: [nfc-l] Clay-colored Sparrow? southwestern Pennsylvania > > -- *Cornell University* *College of Agriculture and Life Sciences* *Department of Ecology & Evolutionary Biology* *Undergraduate Researcher at the Lab of Ornithology* -- NFC-L List Info: Welcome and Basics � http://www.northeastbirding.com/NFC_WELCOME Rules and Information � http://www.northeastbirding.com/NFC_RULES Subscribe, Configuration and Leave � http://www.northeastbirding.com/NFC-L_SubscribeConfigurationLeave.htm Archives: The Mail Archive � http://email@example.com/maillist.html Surfbirds � http://www.surfbirds.com/birdingmail/Group/NFC-L Birding.ABA.Org � http://birding.aba.org/maillist/NFC Please submit your observations to eBird! ��http://ebird.org/content/ebird/ --