Hoping someone can help me out with an call id.

I was in the Okanogan area (Lake Lyman) and at dusk we heard calls we
couldn't figure out.

It was loud and deep and sounded like a combo honk/bray. It lasted approx a
second and seemed to be call and response. At any rate there was more than
one.

At first we thought it was a mammal but realized it was coming from the
trees.



Current theories are:

some sort of tree frog/toad or

nighthawks creating their "booming" display by vibrating primaries (although
instinctively it sounded like it comes from a throat). There were many
nighthawks feeding at that time.



Any ideas?



Thanks!



ginger moriarty

seattle