Doug Wechsler / Emerald-bellied woodnymph (Thalurania hypochlora) male flying to flower to feed, Province El Oro, Buenaventura Biological Reserve, Ecuador

Melvin Grey / Green-crowned woodnymph (Thalurania fannyi) adult male sitting on thin branch, Milpe, Ecuador

Melvin Grey / Green-crowned woodnymph hummingbird (Thalurania fannyi) hummingbird adult female perched, Milpe, Ecuador.

Melvin Grey / Green-crowned woodnymph hummingbird (Thalurania fannyi) hummingbird adult male perched, Milpe, Ecuador.

Glenn Bartley / Violet-crowned Woodnymph (Thalurania colombica) hummingbird bathing, Costa Rica

Greg Basco / Violet-crowned Woodnymph (Thalurania colombica) hummingbird flying, Costa Rica

Luiz Claudio Marigo / Violet-capped Woodnymph (Thalurania glaucopis) feeding on Grevillea banksii flowers (native of Australia) in the lowland Southern Bahia Atlantic Rainforest, Estacao Veracel Private Nature Heritage Res...

Angelo Gandolfi / Violet-capped woodnymph (Thalurania glaucopis), male, Parana State, Iguazu, Brazil, September.

Paul Hobson / Crowned woodnymph (Thalurania columbica) at rest, Costa Rica

Konrad Wothe / Fork-tailed Woodnymph (Thalurania furcata) feeding on Heliconia flower nectar, ambopata Reserve, Peru, South America.

Glenn Bartley / Fork-tailed Woodnymph (Thalurania furcata) male, Manu National Park, Peru

Glenn Bartley / Violet-crowned Woodnymph (Thalurania colombica) male, Costa Rica