Laurent Geslin / Nightjar {Caprimulgus europaeus} with chick on ground, UK.

David Tipling / Nightjar {Caprimulgus europaeus} male in display flight at dusk, North Norfolk, UK, June

David Tipling / Nightjar {Caprimulgus europeaea} male in display flight at night, North Norfolk, UK, June

David Tipling / Nightjar {Caprimulgus europaeus} male churring on song post at dusk, North Norfolk, UK, June

David Tipling / Nightjar {Caprimulgus europaeus} at nest in threat display towards advancing Adder, North Norfolk, UK, May

Mike Wilkes / Nightjar (Caprimulgus europaeus) on nest. England, UK, Europe

David Kjaer / Nightjar on nest, England

Dong Lei / Grey nightjar (Caprimulgus indicus). Simao, Pu'er Prefecture, Yunnan Province, China.

Karine Aigner / Pauraque (Nyctidromus albicollis) with chick on nest. Texas, USA. June.

Karine Aigner / Pauraque (Nyctidromus albicollis) two chicks in nest. Texas, USA. June.

Karine Aigner / Pauraque (Nyctidromus albicollis) two chicks in nest. Texas, USA. June.

Markus Varesvuo / Egyptian nightjar (Caprimulgus aegyptius), two resting on sand, camouflaged amongst pebbles. Morocco. March.