October 11, 2011 by Martin Reid at "the Willows" - a tiny scrap of willows, reeds and bushes around a small freshwater pond amidst coastal grass/scattered low scrub, 50 yards east of Highway 361 on Mustang Island, Nueces County Texas, about 4 or 5 miles south of Port Aransas:
MANDIBLE PATTERN: although the pale area ahead of the central feathering is c. one-third of the mandible, the distal dusky region extends completely down each side, thus creating an overall pattern that is c. three-quarters dusky:
CLICK HERE to listen to the first short audio clip.
This is the spectrogram of the above clip, kindly prepared by Keith Bartels and used here with his permission:
CLICK HERE to listen to the second even shorter audio clip.
This is the spectrogram of the above clip, kindly prepared by Keith Bartels and used here with his permission:
For comparison here is a clip from Xeno-Canto file XC41235 by Scott Olmstead recorded in Sonora, Mexico - used here in accordance with their Public Domain copyright policy:
