help, mystery AZ bird

["Bruce" natureguyusa]

Hi,

After recording in Arizona in May, I am having a heck of time ID'ing 
some of the birds. One bird in particular I just have no idea on is in 
this recording snip-it: http://www.natureguystudio.com/share%20data/AZ%
20desert%20mystery%20bird%20051107.mp3

There are a few birds on the recording; a few warblers, some kind of 
Thrasher (I think), and the bird in question. It was recorded near a 
small creek in dense cover and large trees, in a desert east of 
Phoenix. I wasn't able to get a visual on it. It didn't seem to move 
very much, possibly near a nest. I did see some Yellow-Breasted Chats 
in the area. It sounds a little like a cuckoo or maybe Trogon, but it 
should be too far north to be a Trogon, and I am unable to match it up 
to anything I have heard from many sources. Any ideas?? 

Thanks much!
Bruce Rutkoski