Murray Cooper / Southern Double-collared Sunbird (Cinnyris chalybeus) male on flower, South Africa

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

Richard Du Toit / Greater Double-collared Sunbird (Nectarinia afra) male on flower, Itala Game Reserve, South Africa

Richard Du Toit / Greater Double-collared Sunbird (Nectarinia afra) feeding, Gauteng, South Africa