Re: orapendula?

["flawn1951" flawn1951]

I'm the recordist who taped the ones you heard on NPR. You can hear 
more from that Tiputini Ecuador site at NPR's Radio Expeditions website:

http://www.npr.org/templates/story/story.php?storyId=5424426

And click on the link in the lower right that says "Oropendula call".

You can also hear the two full Tiputini radio pieces, and a Web-only 
audio extra, by following links from that page. You can also subscribe 
to get podcasts of our future Radio Expeditions stories.

I'm not enough of an expert to give you a more detailed species ID, 
more of a babe in the woods in that regard.

--Flawn Williams
NPR/NGS Radio Expeditions