Animals, Birds, A male Green Violetear Hummingbird, Colibri thalassinus, and a male Grey-tailed or Gray-tailed Mountaingem, Lampornis cinereicauda, face off in a territorial display in the Savegre River Valley in Costa Rica. The Violetear has spread his 'ear' feathers to appear more aggressive. Until recently the grey-tailed Mountaingem was believed to be a subspecies of the white-throated mountaingem, Lampornis castaneoventris.

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Size: 4680px × 3744px
Photo credit: © Jon G Fuller / Alamy / Afripics
License: Licensed
Model Released: No

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