Klein & Hubert / African red-eyed bulbul (Pycnonotus nigricans) jumping while bathing at water hole Kalahari Desert, South Africa.

Staffan Widstrand / Wild Wonders of China / Styan's Bulbul (Pycnonotus taivanus) endemic species, Kenting National Park, Taiwan

Terry Whittaker / Malagasy bulbul (Hypsipetes madagascariensis) feeding, perched on branch with food in beak. Mantadia Forest, Madagascar.

Terry Whittaker / Malagasy bulbul (Hypsipetes madagascariensis) feeding on berries. Mantadia Forest, Madagascar.

Guy Edwardes / Dark-capped bulbul (Pycnonotus tricolor) perched on tree snag. Savuti, Chobe, National Park, Botswana.

Robin Chittenden / Yellow-browed bulbul (Acritillas indica) Sri Lanka.

Robin Chittenden / Yellow-browed Bulbul (Acritillas indica) Sri Lanka

Sylvain Cordier / Red-vented bulbul (Pycnonotus cafer) perched on branch. Jim Corbett National Park, Uttarakhand, India.

Sylvain Cordier / Red-vented bulbul (Pycnonotus cafer) landing on branch. Jim Corbett National Park, Uttarakhand, India.

Staffan Widstrand / Wild Wonders of China / White-throated bulbul (Alophoixus flaveolus) Tongbiguan Nature Reserve, Dehong, Yunnan, China

Staffan Widstrand / Wild Wonders of China / Red-whiskered bulbul (Pycnonotus jocosus) Tongbiguan Nature Reserve, Dehong, Yunnan, China

Staffan Widstrand / Wild Wonders of China / White-throated bulbul (Alophoixus flaveolus) Tongbiguan Nature Reserve, Dehong, Yunnan, China

Staffan Widstrand / Wild Wonders of China / Red-whiskered bulbul (Pycnonotus jocosus) Tongbiguan Nature Reserve, Dehong, Yunnan, China

Oscar Dewhurst / Red-vented bulbul (Pycnonotus cafer) perched on rock. Karnataka, India.

Cyril Ruoso / Madagascar bulbul (Hypsipetes madagascariensis) perched on branch. Madagascar.

Robin Chittenden / Square-tailed bulbul (Hypsipetes ganeesa) perched, Sri Lanka.

Ann & Steve Toon / Cape bulbul (Pycnonotus capensis) feeding on flowers, Kirstenbosch Botanical Gardens, Cape Town, South Africa, September

Klein & Hubert / African red-eyed bulbul (Pycnonotus nigricans) drinking at waterhole, Kalahari, South Africa.

Klein & Hubert / African red-eyed bulbul (Pycnonotus nigricans) bathing at waterhole. Kalahari Desert, South Africa

Klein & Hubert / African red-eyed bulbul (Pycnonotus nigricans) bathing at waterhole. Kalahari Desert, South Africa

Klein & Hubert / African red-eyed bulbul (Pycnonotus nigricans) bathing at waterhole. Kalahari Desert, South Africa

Staffan Widstrand / Wild Wonders of China / Black bulbul (Hypsipetes leucocephalus) perched on a branch of a tree in Hong Bung He, Dehong, Yunnan, China

Staffan Widstrand / Wild Wonders of China / Red-vented bulbul (Pycnonotus cafer) perched on a branch in the forest of Hong Bung He, Dehong, Yunnan, China

Staffan Widstrand / Wild Wonders of China / Flavescent bulbul (Pycnonotus flavescens) Hong Bung He, Dehong, Yunnan, China

Staffan Widstrand / Wild Wonders of China / Red-whiskered bulbul (Pycnonotus jocosus) perched on abranch with orange flowers in Hong Bung He, Dehong, Yunnan, China

Staffan Widstrand / Wild Wonders of China / Puff-throated bulbul (Alophoixus flaveolus) perched on a tree trunk, Hong Bung He, Dehong, Yunnan, China

Richard Du Toit / Bat House with Cape bulbul (Pycnonotus capensis) perched on top, Garden Route National Park, Western Cape Province, South Africa.

Ann & Steve Toon / Dark-capped bulbul (Pycnonotus tricolor). Zimanga private game reserve, KwaZulu-Natal, South Africa. June.

Ingo Arndt / Collared finchbill (Spizixos semitorques), Chengdu, China

Nick Garbutt / Red-eyed bulbul (Pycnonotus brunneus) feeding on fruit in the rainforest canopy. Lowland Dipterocarp rainforest, Danum Valley, Sabah, Borneo. September.

Aflo / Brown-eared bulbul (Hypsipetes amaurotis) feeding on berries, Tokyo, Japan.

Matthew Maran / Black-crested bulbul (Pycnonotus melanicterus), Khao Yai National Park, Thailand.

Ann & Steve Toon / Dark-capped bulbuls (Pycnonotus tricolor), Zimanga private Game Reserve, KwaZulu-Natal, South Africa

Ann & Steve Toon / Dark-capped bulbul (Pycnonotus tricolor) at waterhole, Zimanga private Game Reserve, KwaZulu-Natal, South Africa

Klein & Hubert / Common bulbul (Pycnonotus barbatus) taking off, Botswana.

Dong Lei / Sooty-headed Bulbul (Pycnonotus aurigaster) perched on bare branch. Xishuangbanna National Nature Reserve, Yunnan Province, China. March.

Dong Lei / Puff throated bulbul (Alophoixus pallidus) perched on bare branch, Xishuangbanna National Nature Reserve, Yunnan Province, China. March.

Dong Lei / Brown-breasted bulbul (Pycnonotus xanthorrhous) perched on Permisson tree, Kawakarpo Mountain, Meri Snow Mountain National Park, Yunnan Province, China, January.

Dong Lei / Brown-breasted bulbuls (Pycnonotus xanthorrhous) feeding on Permisson, Kawakarpo Mountain, Meri Snow Mountain National Park, Yunnan Province, China, January.

Hanne & Jens Eriksen / White spectacled bulbul (Pycnonotus xanthopygos) perched, Oman, January

Hanne & Jens Eriksen / White browed bulbul (Pycnonotus luteolus) on branch, India, February

Hanne & Jens Eriksen / Stripe throated bulbul (Pycnonotus finlaysoni) on ground, Thailand, February

Anup Shah / Common Bulbul (Pycnonotus barbatus). Kakamega Forest South, Western Province, Kenya. Kakamega Forest South, Western Province, Kenya.

Anup Shah / Red-tailed bristlebill (Bleda syndactyla woosnami) pair perched on a tree stump. Kakamega Forest South, Western Province, Kenya.

Anup Shah / Red-tailed bristlebill (Bleda syndactyla woosnami) perched on the branch of a tree. Kakamega Forest South, Western Province, Kenya.

Hanne & Jens Eriksen / Flavescent bulbul (Pycnonotus flavescens) on twig, Thailand, February.

Hanne & Jens Eriksen / Black crested bulbul (Pycnonotus flaviventris) perched, Thailand, February

Hanne & Jens Eriksen / Black crested bulbul (Pycnonotus flaviventris) on ground, Thailand, February