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

Pete Oxford / Long-tailed Sylph (Aglaiocercus kingi) male, western slope of Andes, Ecuador

Pete Oxford / Long-tailed Sylph (Aglaiocercus kingi) male, Mashpi Rainforest Biodiversity Reserve, Pichincha, Ecuador

Melvin Grey / Violet-tailed sylph hummingbird (Aglaiocercus coelestis) hummingbird adult male, approaching flower to feed, Tandayapa, Ecuador

Tui De Roy / Violet tailed sylph (Aglaiocercus coelestis) Guango private reserve, Papallacta Valley, Andean Cloud Forest, East slope, Ecuador

Rolf Nussbaumer / Violet-tailed Sylph (Aglaiocercus coelestis), male feeding on ginger flower in rain, Mindo, Ecuador, Andes, South America, January

Ingo Arndt / Long-tailed Sylph (Aglaiocercus kingi) male feeding on flower, Andes, Ecuador

David Pattyn / Long-tailed sylph hummingbird (Aglaiocercus kingii) feeding from bird feeder, Mindo, Pichincha, Ecuador , July

David Pattyn / Long-tailed sylph hummingbird (Aglaiocercus kingii) Mindo, Pichincha, Ecuador , July

Thomas Marent / Long-tailed Sylph (Aglaiocercus kingi) hummingbird, Rio Blanco Nature Reserve, Colombia

Sandesh Kadur / Pair of Glowing pufflegs (Eriocnemis vestita) chasing away a Long-tailed sylph (Aglaiocercus kingii), Ecuador.

Lucas Bustamante / Violet-tailed sylph hummingbird (Aglaiocercus coelestis) Mindo, Pichincha, Ecuador .