Animals, Birds, A Black-bellied Hummingbird, Euperusa nigriventris, sits on a lobster-claw heliconia while a Green Thorntail Hummingbird, Discosura conversii, hovers nearby in Costa Rica.

Animals, Birds, A Black-bellied Hummingbird, Euperusa nigriventris, feeds on the nector of a tropical flower of the Kohleria genus of the Gesneriaceae or African Violet family, and in the process, pol...

Animals, Birds, A male Black-bellied Hummingbird, Euperusa nigriventris, pollinates a tropical blueberry flower while a Green Thorntail Hummingbird, Discosura conversii, waits its turn. Costa Rica.

Animals, Birds, A Black-bellied Hummingbird, Euperusa nigriventris, approaches a tropical blueberry flower to feed, and in the process, pollinates the flowers as it flies from one to the next. Costa R...

Animals, Birds, A Black-bellied Hummingbird, Euperusa nigriventris, feeds on the nector of a tropical blueberry flower, and in the process, pollinates the flowers as it flies from one to the next. Cos...

Animals, Birds, A male Blue-chested Hummingbird, Amazilia amabilis, perched on a branch in the Rainforest Discovery Center in Panama.

Animals, Birds, A male Black-bellied Hummingbird, Euperusa nigriventris, and Hairy Heliconia flower, Heliconia vellerigera, in Costa Rica. Photographed in high key for artistic effect.

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 Coppery-headed Emerald and a Rufous-tailed Hummingbird feed together on a Lobster Claw Heliconia in Costa Rica.

Animals, Birds, A male Coppery-headed Emerald Hummingbird, Elvira cupreiceps, feeds on the nector of a neotropical blueberry flower in Costa Rica. Photographed in high key for artistic effect.

Animals, Birds, A Coppery-headed Emerald Hummingbird approaches a tropical Kohleria flower in Costa Rica. The bird is also pollinating the flowers as it moves from one to another to feed.