Animals, Birds, Black-bellied Hummingbird, Euperusa nigriventris, and a Coppery-headed Emerald Hummingbird, - Elvira cupreiceps compete for feeding space on a Costus flower in Costa Rica.

Animals, Birds, A Black-bellied Hummingbird and a Coppery-headed Emerald Hummingbird face off in competition for a feeding site on a Costus flower in Costa Rica.

Animals, Birds, A female Green-crowned Brilliant Hummingbird, Heliodoxa jacula, protects her feeding spot from another female in Costa Rica.

Animals, Birds, A female Green-crowned Brilliant Hummingbird, Heliodoxa jacula, approaches a yellow Costus flower to feed in Costa Rica.

Animals, Birds, A female Green-crowned Brilliant Hummingbird, Heliodoxa jacula, feeds on the nectar of a tropical Costus flower in Costa Rica.

Animals, Birds, A female Green-crowned Brilliant Hummingbird, Heliodoxa jacula, approaches a yellow Costus flower to feed in Costa Rica.

Animals, Birds, Territorial competition between a male Magnificent Hummingbird, Eugenes fulgens, at right, and a female Green-crowned Brilliant Hummingbird, Heliodoxa jacula, perched on a yellow Costu...

Animals, Birds, A female Green-crowned Brilliant Hummingbird, Heliodoxa jacula, perches on a yellow Costus flower while feeding. A female Purple-throated Mountain-gem Hummingbird, Lamporis calolaemus,...

Animals, Birds, A male Magnificent Hummingbird, Eugenes fulgens, feeds on a tropical Costus flower in Costa Rica. The position of the bird's wing illustrates the figure-eight beat pattern of hummingbi...

Animals, Bird, Hummingbird, A male Violet Sabrewing Hummingbird, Campylopterus hemileucurus, approaches a tropical Costus flower to feed on nectar in Costa Rica.