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small hummingbird
garden in the middle of rainforest
common
I agree, this one looks to be the Violet-headed Hummingbird. The size and shape of the postocular white spot are the most important sign.
Estoy de acuerdo con Karen que este es un Violet-headed Colibri. El tamanio y forma de la mancha blanca atras del ojo es la senia mas importante.
http://eol.org/pages/1048779/overview this map shows a few spottings near this one.