Richard Du Toit / Malachite sunbird {Nectarinia famosa} male feeding from flowers, South Western Cape, South Africa

Heather Angel / Jade vine (Strongylodon macrobotrys) in glasshouse at Kew Gardens, London, UK. Endemic to the Philippines. Pollinated by sunbirds.

Hanne & Jens Eriksen / Purple sunbird (Cinnyris asiaticus) male on Aloe vera, Oman, April

Nick Garbutt / Malachite sunbird (Nectarinia famosa) male feeding on Aloe flower. Ndutu area, Ngorongoro Conservation Area NCA / Serengeti National Park, Tanzania.

Juergen Freund / Female Olive-backed / Yellow-bellied Sunbird in her nest (Cinnyris jugularis) Australia.

Sue Flood / Olive-backed Sunbird (Cinnyris jugularis) male, Ocean Dunes Golf Course, Phan Thiet, Vietnam.

Hanne & Jens Eriksen / Shining sunbird (Nectarinia habessinica) male feeding on nectar, Oman, March

Robin Chittenden / Beautiful sunbird (Cinnyris pulchellus) Western Division, Gambia February

Kerstin Hinze / Greater Double collared sunbird (Nectarinia afra), male feeding from Natal Bottle Brush (Greyia sutherlandii) Hidden Valley, KwaZulu-Natal, South Africa, October

Kerstin Hinze / Greater Double collared sunbird (Nectarinia afra), female feeding from Natal Bottle Brush (Greyia sutherlandii) Hidden Valley, KwaZulu-Natal, South Africa, October

Kerstin Hinze / Greater Double collared sunbird (Nectarinia afra), female feeding from Natal Bottle Brush (Greyia sutherlandii) Hidden Valley, KwaZulu-Natal, South Africa, October

Charlie Summers / Beautiful sunbird (Cinnyris pulchella) female, Tarangire National Park, Tanzania