Lucas Bustamante / Golden-Tailed Sapphire (Chrysuronia oenone) Sumaco National Park, Napo, Ecuador

Lucas Bustamante / Green-crowned woodnymph (Thalaurania fannyi) Mashpi, Pichincha, Ecuador

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

John Shaw / Violet-tailed sylph hummingbird (Aglaiocercus coelestis) in flight, about to land. Ecuador, May.

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

Marie Read / Ruby-throated Hummingbird (Archilocus colubris), male flying in to feed from cardinal flowers (Lobelia cardinalis) New York, USA. August.

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.

Pedro Narra / Cuban emerald hummingbird (Chlorostilbon ricordii) Guanahacabibes Peninsula National Park, Cuba

Pedro Narra / Bee hummingbird (Mellisuga helenae) hovering in front of flower, Guanahacabibes Peninsula National Park, Cuba