Oscar Dewhurst / Long-billed sunbird (Cinnyris lotenius) nectaring on flowers. Goa, India. September.

Mike Read / Eurasian treecreeper (Certhia familiaris) on Alder trunk. Beside Robin's Hide, Langford Lakes Nature Reserve, Steeple Langford, Wiltshire, England, UK. February.

Robin Chittenden / Dorothy's short-toed treecreeper (Certhia brachydactyla dorotheae) on tree trunk. Cyprus. April.

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 / New Holland honeyeater (Phylidonyris novaehollandiae) nectaring on Grevillea (Grevillea sp) in garden. Western Australia. September.

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

Heather Angel / Orange breasted sunbird (Anthobaphes violacea), male nectaring on Heather (Erica sp). Kirstenbosch Botanic Garden, Cape Town, South Africa. February

Steven David Miller / Olive-backed sunbird (Nectarinia jugularis) female in her nest with tongue visible, Cape Hillsborough National Park, Queensland, Australia, September.

Steven David Miller / Olive-backed Sunbird (Nectarinia jugularis) male on a Hibiscus flower to feed, Rollingstone Beach, North Queensland, Australia. September.

Steven David Miller / Olive-backed Sunbird (Nectarinia jugularis) male taking turns with his mate to bring nesting material to their nest, Cape Hillsborough National Park, Queensland, Australia

Steven David Miller / Olive-backed Sunbird (Nectarinia jugularis) A female olive-backed sunbird returns to her nest, Queensland's Cape Hillsborough National Park Australia