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

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.

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

Glenn Bartley / Long-tailed Sylph (Aglaiocercus kingi) hummingbird, Ecuador

Glenn Bartley / Long-tailed Sylph (Aglaiocercus kingi) male, Abra Patricia Protected Area, Peru

Glenn Bartley / Long-tailed Sylph (Aglaiocercus kingi) male, Abra Patricia Protected Area, Peru

Glenn Bartley / Long-tailed Sylph (Aglaiocercus kingi), Ecuador

Glenn Bartley / Long-tailed Sylph (Aglaiocercus kingi) male, Ecuador

Tim Fitzharris / Long-tailed Sylph (Aglaiocercus kingi) feeding on flower nectar, Jurong Bird Park, Singapore

Murray Cooper / Long-tailed Sylph (Aglaiocercus kingi) male, Ecuador

Pete Oxford / Long-tailed Sylph (Aglaiocercus kingi) male perched on branch. Cloud forest, Tapichalaca Reserve, Southern Ecuador, South America

Pete Oxford / Long-tailed Sylph (Aglaiocercus kingi) male perched on branch. Cloud forest, Tapichalaca Reserve, Southern Ecuador, South America

Pete Oxford / Long-tailed Sylph (Aglaiocercus kingi) female perched on branch. Cloud forest, Tapichalaca Reserve, Southern Ecuador, South America

Murray Cooper / Long-tailed Sylph (Aglaiocercus kingi) hummingbird male, Ecuador

Murray Cooper / Long-tailed Sylph (Aglaiocercus kingi) hummingbird male, Ecuador

Tim Fitzharris / Long-tailed Sylph (Aglaiocercus kingi) hummingbird feeding on flower, Ecuador

Pete Oxford / Long-tailed Sylph (Aglaiocercus kingi) hummingbird male in cloud forest, Tapichalaca Reserve, Ecuador

Pete Oxford / Long-tailed Sylph (Aglaiocercus kingi) hummingbird male in cloud forest, Tapichalaca Reserve, Ecuador

Pete Oxford / Long-tailed Sylph (Aglaiocercus kingi) hummingbird male in cloud forest, Tapichalaca Reserve, Ecuador

Pete Oxford / Long-tailed Sylph (Aglaiocercus kingi) hummingbird female in cloud forest, Tapichalaca Reserve, Ecuador

Pete Oxford / Long-tailed Sylph (Aglaiocercus kingi) hummingbird male in cloud forest, Tapichalaca Reserve, Ecuador

Pete Oxford / Long-tailed Sylph (Aglaiocercus kingi) hummingbird female in cloud forest, Tapichalaca Reserve, Ecuador

Mike Read / Long tailed sylph male {Aglaiocercus kingi} San Isidro, Galapagos

Mike Read / Long tailed sylph male {Aglaiocercus kingi} San Isidro, Ecuador

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

Konrad Wothe / Long-tailed Sylph (Aglaiocercus kingi) male, Ecuador

Konrad Wothe / Long-tailed Sylph (Aglaiocercus kingi) male, Ecuador

Konrad Wothe / Long-tailed Sylph (Aglaiocercus kingi) male at feeder, Ecuador

Mike Read / Long tailed sylph male {Aglaiocercus kingi} San Isidro Galapagos

Steve Gettle / Long-tailed Sylph (Aglaiocercus kingi) hummingbird, Ecuador

Roland Seitre / Long-tailed sylph hummingbird (Aglaiocercus kingi) Reserva Natural Rio Blanco, Manizales, Colombia.

Roland Seitre / Long-tailed Sylph (Aglaiocercus kingi) hummingbird, Cosanga, Napo, Ecuador

Roland Seitre / Long-tailed Sylph (Aglaiocercus kingi) hummingbird, Cosanga, Napo, Ecuador