[mou] state fair question

[revdeb51 at comcast.net]

Gordon Andersson and I did the afternoon shift at the fair. It was a great day. We had lots of good interaction with the public and handed out almost a full box of magazines. 
One question stumped us both. 
We were asked about a bird that calls only at night, gives one call and then is silent. The location is a woody area far from a lake or wetlands, somewhere in mid-Minnesota.

Does anyone know of such a thing. 
We guessed frogs, insects but the fair goer insisted that it was a bird call. 

--
Oh no, not another learning experience!

Debra J. Wells
6222 Yucca Lane North
Maple Grove, MN 55311