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

Neil Aldridge / Cape sugarbird (Promerops cafer) on Pincushion protea (Leucospermum sp) in the Cape Floral Kingdom, Cape Town, South Africa. Endemic.

Neil Aldridge / Cape sugarbird (Promerops cafer) feeding on a Pincushion protea (Leucospermum sp) in the Cape Floral Kingdom, Cape Town, South Africa. Endemic to the fynbos region of South Africa.

Kevin Schafer / Southern Double-collared Sunbird (Cinnyris chalybeus) male on Pincushion (Leucospermum sp) protea flower, Kirstenbosch Garden, Cape Town, South Africa

Rob Tilley / King Protea (Protea cynaroides) bud close-up detail. Maui, Hawaii, February.

Gerry Ellis / Cape Sugarbird (Promerops cafer) male perching on Protea flowers (Mimetes protea), Kirstenbosch Garden, South Africa

Richard Du Toit / Amethyst Sunbird (Amethyst Sunbird) sub-adult male on King Protea (Protea cynaroides) flower, Western Cape, South Africa

Heather Angel / Southern double-collared sunbird (Cinnyris chalybeus), male nectaring on Pincushion protea (Leucospermum cordifolium). Cape, South Africa. August.

Heather Angel / Malachite sunbird (Nectarinia famosa) male perching on King protea (Protea cynaroides) whilst foraging for nectar. Pearl Mountain Reserve, South Africa, August.

Heather Angel / Malachite sunbird (Nectarinia famosa) male nectaring on King protea (Protea cynaroides). Pearl Mountain Reserve, South Africa, August.

Heather Angel / Southern double-collared sunbird (Cinnyris chalybeus), male nectaring on Pincushion protea (Leucospermum cordifolium). Kirstenbosch National Botanical Garden, Cape Town, South Africa. August.

Heather Angel / Cape sugarbird (Promerops cafer) male nectaring on Pincushion protea (Leucospermum cordifolium). Pollen transferred from anthers to bird's head. Kirstenbosch National Botanical Garden, Cape Town,...