European Nightjar
Caprimulgus europaeus
The European nightjar is 24.5–28 cm (9.6–11.0 in) long, with a 52–59 cm (20–23 in) wingspan. The male weighs 51–101 g (1.8–3.6 oz) and the female 67–95 g (2.4–3.4 oz). The adult of the nominate subspecies has greyish-brown upperparts with dark streaking, a pale buff hindneck collar and a white moustachial line. The closed wing is grey with buff spotting, and the underparts are greyish-brown, with brown barring and buff spots. The bill is blackish, the iris is dark brown and the legs and feet are brown. The flight on long pointed wings is noiseless, due to their soft plumage, and very buoyant. Voice: The male European nightjar's song is a sustained churring trill, given continuously for up to 10 minutes with occasional shifts of speed or pitch. It is delivered from a perch, and the male may move around its territory using different song posts. Singing is more frequent at dawn and dusk than during the night, and is reduced in poor weather.
ID text from Wikipedia, CC BY-SA 4.0
Fiery-necked Nightjar
Caprimulgus pectoralis
An adult fiery-necked nightjar is relatively small measuring between 23 and 25 centimeters. Their plumage is mostly a variegated grayish-brown and brownish-white colour. The fiery-necked nightjar has a distinct rufous collar, which are tawny coloured feathers located at the back of the neck, giving the species its common name. They have a large white throat patch. The feathers around their eyes and at their shoulders are chestnut brown. They have a light colored crown at the top of their head with a darker spot at the center. Black spots run down on either side the scapulas. Voice: The fiery-necked nightjar is best known for its very distinctive song. It consists of a series of mellow notes that many say sounds like "Good Lord, deliver us deliver us deliver us". This song is often preceded by a wind-up call. However, they can sometimes sing this wind-up call for a very long period and never switch to the full song.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: European Nightjar and Fiery-necked Nightjar.