Mary McDonald / Lesser racket-tailed drongo (Dicrurus remifer) perched on tree branch, Satpura National Park, Madhya Pradesh, India

Bernard Castelein / Greater Racket-tailed Drongo (Dicrurus paradiseus). Sepahijala Wildlife Sanctuary, Tripura, India.

Bernard Castelein / Greater Racket-tailed Drongo (Dicrurus paradiseus). Sepahijala Wildlife Sanctuary, Tripura, India.

Loic Poidevin / Madagascar crested drongo (Dicrurus forficatus) perched on branch, Madagascar.

Richard Du Toit / Tawny Eagle (Aquila rapax) mobbed by Fork-tailed Drongos (Dicrurus adsimilis), Kgalagadi Transfrontier Park, South Africa

Chien Lee / Plain-pouched Hornbill (Aceros subruficollis) male approaching nest cavity being mobbed by Greater Racket-tailed Drongo (Dicrurus paradiseus), Uthai Thani, Thailand

Mary McDonald / Black Drongo (Dicrurus macrocercus) perched. Satpura National Park, Madhyda Pradesh, India.

Charlie Summers / Fork-tailed / Common Drongo (Dicrurus adsimilis) perched on branch, Kgalagadi TB Park of South Africa, May

ASHISH & SHANTHI CHANDOLA / Blackbuck (Antilope cervicapra) male with Drongo perched on its back, Blackbuck National Park, Velavadar, Gujarat, India, January 2010

ASHISH & SHANTHI CHANDOLA / Blackbuck (Antilope cervicapra) male with Drongo perched on its back, Blackbuck National Park, Velavadar, Gujarat, India, January 2010

Suzi Eszterhas / Greater Kudu (Tragelaphus strepsiceros) portrait of bull, with Drongo (Dicruridae) in foreground, Mala Mala Reserve, South Africa

Nick Upton / Black drongo (Dicrurus macrocercus) perched on disused overhead electrical cable, calling, Guandu Nature Park, Taiwan.

Hanne & Jens Eriksen / Black drongo {Dicrurus macrocercus} perched, Tamil Nadu, India

Jouan & Rius / Fork tailed Drongo (Dicrurus adsimilis) perched on tree stump, Etosha NP, Namibia

Gabriel Rojo / Fork tailed drongo {Dicrurus adsimilis} Natal, South Africa

Patricio Robles Gil / Crested Drongo (Dicrurus forficatus) portrait, endemic species, Madagascar

Nick Garbutt / Crested Drongo {Dicrurus forficatus} Anjajavy, north west Madagascar.

Hanne & Jens Eriksen / Fork tailed Drongo {Dicrurus adsimilis} perching in bush, Kruger NP, South Africa.

Bernard Castelein / Fork tailed drongo (Dicrurus adsimilis) perched in branch, Serengeti NP, Tanzania, East Africa

Philippe Clement / Fork-tailed drongo (Dicrurus adsimilis) Kgalagadi NP, Kalahari desert, South Africa

Jean-Pierre Zwaenepoel / Wild gaur, adult bull {Bos gaurus} endangered, with Black drongo {Dicrurus adsimilis} on nose. Bandhavgarh NP, Madhya Pradesh, India

Jean-Pierre Zwaenepoel / Wild gaur, adult bull {Bos gaurus} endangered, with Black drongo {Dicrurus adsimilis} on nose. Bandhavgarh NP, Madhya Pradesh, India

Jean-Pierre Zwaenepoel / Wild gaur, adult bull {Bos gaurus} endangered, with Mynah {Acridotheres sp} and Black drongo {Dicrurus adsimilis} on back. Madhya Pradesh, Rajasthan, India

Tony Heald / Fork tailed drongo with chick {Dicrurus adsimilis} Kalahari Gemsbok Park, South Africa

Tony Heald / Fork tailed drongo {Dicrurus adsimilis} portrait, Kgalagadi Transfrontier Park, South Africa

Roger Powell / Ashy drongo {Dicrurus leucophaeus} Goa, India

Pete Oxford / Fork tailed drongo on perch. Madagascar

Bernard Castelein / Fork tailed drongo perched, Keoladeo Ghana NP, India