Lucas Bustamante / Sword-billed hummingbird (Ensifera ensifera) Yanacocha, Pichincha, Ecuador

John Chan / Anna's Hummingbird (Calypte anna) chick, sleeping in nest, Southern California, USA, March.

Konrad Wothe / Sword-billed hummingbird (Ensifera ensifera) in flight, North-Ecuador, Ecuador.

John Chan / Female Anna's hummingbird (Calypte anna) incubating eggs, departs from nest momentarily to feed, Southern California, USA, March.

John Chan / Female Anna's hummingbird (Calypte anna) incubating eggs, departs from nest momentarily to feed, Southern California, USA, March.

John Chan / Male Anna's hummingbird (Calypte anna) cleaning its beak on a twig, Southern California, USA, January.

Paul Hobson / Rivoli's hummingbird (Eugenes fulgens) nectaring on Fuchsia (Fuchsia sp) flower. Costa Rica.

Thomas Marent / Sparkling Violet-ear (Colibri coruscans) hummingbird bathing, Bogota, Colombia

Konrad Wothe / Sword-billed hummingbird (Ensifera ensifera) hovering in flight, North-Ecuador.

Glenn Bartley/ BIA / Green Violet-ear (Colibri thalassinus) hummingbird, Colombia

Glenn Bartley / Green Violet-ear (Colibri thalassinus), Costa Rica

Tui De Roy / Sparkling violetear hummingbird (Colibri coruscans) incubating eggs at nest, Andean cloud forest, Ecuador