This 1 minute 30 second recording documents an episode of loud begging from a unknown number of juvenile Vaux's Swifts. I suspect the begging was in response to a feeding event. The begging continued after a short pause and was not included in this present recording. This recording is punctuated by a car passing by.

More details of the context of this recording may be found here: http://ebird.org/ebird/view/checklist?subID=S24386405

This recording was made with an iPhone 4s with Sennheiser microphone and Røde Rec application. This is an unedited and unmodified recording of the natural spacing of this bird's utterances. This recording is part of a longer 30 minute recording of Vaux’s Swift and these calls were captured incidentally.

bird-seen:no

playback-used:no

A brief fly-by over the forest while I was recording something else

bird-seen:no

playback-used:no

This 1 minute 45 second recording documents several songs and excited calling of unaged and unsexed Vaux’s Swifts. A group of 5 swifts were flying low over the building with a nesting chimney and two made stalls as if they were about to enter the chimney. This was during and immediately after the two bouts of excited calling. This recording contains a passing car.

More details of the context of this recording may be found here: http://ebird.org/ebird/view/checklist?subID=S24386405

This recording was made with an iPhone 4s with Sennheiser microphone and Røde Rec application. Note that I put the best signals as a prelude so that the spectrogram would display nicely. There is a 1.5 second silence after the excited calls. What follows is an unedited and unmodified recording of the natural spacing of this bird's utterances. This recording is part of a longer 30 minute recording of Vaux’s Swift and these calls were captured incidentally.

bird-seen:yes

playback-used:no

bird-seen:yes

playback-used:no

This 50 second recording documents 5 fairly strong signals from a flock of six Vaux's Swift.

This recording was made with an iPhone 5s with a Sennheiser shotgun microphone and Røde Rec application. This recording is a cut of a longer track and has not been modified or edited.

http://ebird.org/ebird/view/checklist?subID=S23297497

bird-seen:yes

playback-used:no

At around 8am on November 23, 2013 we arrived at the lake at the Coba Archeological Site. In the parking area to visit the ruins was a large tree that must have been producing a large hatch of insects, since there was a swirling mass (200+) of feeding creatures very low over the crown. They were so tightly-packed and fast that for a second or two we thought they were bats - but a quick look revealed that they were Chaetura swifts. I obtained a few short clips of video showing this behavior, and this audio clip was lifted from one of those videos. The video clip is here: https://www.facebook.com/photo.php?v=10201491669346025&set=vb.1004931697&type=2&theater

bird-seen:yes

playback-used:no

bird-seen:no

playback-used:no