These were recorded in East Texas by Texla Research near the Neches River in the early morning hours of October 27th, 2010. A three man team setup a listening post along a hunting lease road where they hung up a recorder which would be retrieved the next morning. Over the next 90 minutes they performed several manual whoops while listening for return vocals before moving to another research location. The vocals in this recording were captured at 1:50AM, about 15 minutes after the research team cleared the area. This includes many vocals covering a span of about 3 minutes, some of the distant howls are definite coyotes. The three close whoop/howls are what we consider to be interesting. There was not a repeat of the close vocals you will hear during the remainder of the night. The spectrograph below represents the span from just before the first close vocal to just after the second. These have a definite human quality to them and humans would be a possible candidate for this, however, no human presence was detected in the area by the team during the time of their visit and no human activity is detectable during the interim from the time the team left and the occurrence of the vocals. Both the raw recording and a filtered/shortened (to tone down the local cricket) version can be listened to from the links below.
Here is the original recording:
Here is the filtered version:
Credit:http://www.texlaresearch.com/unknownrecordings.htm