Ann & Steve Toon / Cape sugarbird (Promerops cafer) among yellow Pincushion (Leucospermum cordifolium) flowers, Kirstenbosch Botanical Gardens, Cape Town, South Africa, September.

Ole Jorgen Liodden / Red-chested Sunbird (Cinnyris erythrocercus) backlit on flower, Rwanda.

Dong Lei / Mrs Gould's sunbird (Aethopyga gouldiae dabryii) male feeding from Chinese wild peach flowers (Prunus davidiana) Kawakarpo Mountain, Meri Snow Mountain National Park, Yunnan Province, China. May.

Dong Lei / Mrs Gould's sunbird (Aethopyga gouldiae dabryii) male hanging upside down and feeding from Chinese wild peach (Prunus davidiana) male blossom, Kawakarpo Mountain, Meri Snow Mountain National Park, Yun...

Ann & Steve Toon / Cape sugarbird (Promerops cafer) feeding from Pincushion (Leucospermum cordifolium) flower, Kirstenbosch Botanical Gardens, Cape Town, South Africa, September.

Ole Jorgen Liodden / Regal sunbird (Nectarinia regia) on flower, Nyungwe National Park, Rwanda

Ole Jorgen Liodden / Regal sunbird (Nectarinia regia) on flower, Nyungwe National Park, Rwanda

Dong Lei / Mrs Gould's sunbird (Aethopyga gouldiae dabryii) male perched in branch of flowering Chinese wild peach (Prunus davidiana) Kawakarpo Mountain, Meri Snow Mountain National Park, Yunnan Province, China....

Luiz Claudio Marigo / Red-legged honeycreeper (Cyanerpes cyaneus) feeding on Grevillea banksii flowers (native of Australia) lowland Southern Bahia Atlantic Rainforest, Estacao Veracel Private Nature Heritage Reserve, muni...

Anup Shah / Stulmann's blue monkey (Cercopithecus mitis stuhlmanni) drinking from the water collected overnight in the flowers of a Bottle Brush tree. Kakamega Forest South, Western Province, Kenya.

Roland Seitre / Lifu Cardinal Honeyeater (Myzomela cardinalis lifuensis) feeding on flower nectar, We, Lifou, New Caledonia.

Roland Seitre / Lifu Cardinal Honeyeater (Myzomela cardinalis lifuensis) feeding on flower nectar, We, Lifou, New Caledonia.