This video is called Birding Ecuador Part I; the North-West.
From Wildlife Focus about another video:
Velvet-purple Coronet Hummingbird from the http://www.hummingbirdsguide.net
Native to Ecuador and Columbia
Sic; Colombia is meant.
Birding in Costa Rica – Green Violetear (Colibri thalassinus): here.
Costa Rica Trip Report – Stripe-Tailed Hummingbird: here.
New findings suggest birds learn the art of nest-building, rather than it being just an instinctive skill: here.
Dear Kitty. Some blog 
Bird Song Yields a New Understanding of Cooperation
Friday, November 04, 2011 :: Staff infoZine
A bird duet springs forth from each bird’s knowledge of the entire song
Washington, D.C. – infoZine – The site of a volcano isn’t the first place one might think of to study cooperation. But neuroscientist Eric Fortune of Johns Hopkins University and colleagues went to the slopes of Antisana volcano in Ecuador to study cooperation as it plays out with a very special songbird, the plain-tailed wren. Funded in part by the National Science Foundation, the researchers report their observations in the Nov. 4, 2011, issue of Science.
Rapidly alternating their singing back and forth, female and male wrens cooperate to sing a duet that sounds as if a single bird sang it. The researchers assumed that the brain of each bird would have a memory of its own part of the duet, and also have a memory of the cues from its partner. They were surprised to find that both brains had a record of the complete duet–a performance that neither bird can do by itself.
As with humans dancing a tango, one could assume that both people know their own parts of the dance and the cues from their partner, but this research suggests that both partners’ brains have a powerful representation of the complete tango performance.
This simple insight from these dueting wrens is a new way to looking at cooperation. Perhaps in human endeavors it is more important to have an image of what a group wants to achieve than each participant’s own tasks.
http://www.infozine.com/news/stories/op/storiesView/sid/49619/
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