Violet Bellied Hummingbird
Birds of Panama - large bird photo gallery
The Violet-bellied Hummingbird (Damophila julie) is found in Colombia, Ecuador, Panama, and Peru; it can occasionally be seen in Costa Rica. For more details from Wikipedia about the Violet Bellied Hummingbird please see this page here.
These Violet Bellied Hummingbird images where taken at the Panama Rainforest Discovery Center, near the Pipeline Road in Panama.