Green Violet-ear in flight at Curi-Cancha, near Monteverde, Costa Rica

Green Violet-ear in flight at Curi-Cancha, near Monteverde, Costa Rica - Green Violet-ear
Curi-Cancha Wildlife Refuge, near Monteverde, Costa Rica (August 2012)

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Probably of the sub-species cabanidis based on location. In all, four sub-species are presently recognised:

thalassinus (Mexican Violet-ear) - Central and South Mexico to North Central Nicaragua.
cabanidis - Costa Rica and West Panama.
cyanotus (Mountain Violet-ear) - Mountains of Venezuela, Colombia and Ecuador.
crissalis - Andes of Peru and Bolivia, and North West Argentina.

For more information on this bird species see the following links:
Green Violet-ear / Internet Bird Collection
Green Violet-ear / Bird Forum
IUCN Red List of Threatened Species / Colibri thalassinus
BirdLife International / Green Violet-ear Colibri thalassinus