Description
English: A European Nightjar flying. A lithograph of a painting by John Gerrard Keulemans. It is captioned with its old names.
Date between 1885 and 1897
Source Coloured figures of the birds of the British Islands / issued by Lord Lilford http://biodiversitylibrary.org/page/34524440#page/70/mode/1up
Author John Gerrard Keulemans (1842–1912) (lithograph by W. Greve, Berlin)
Source: https://commons.wikimedia.org/wiki/File:Caprimulgus_europaeus_-Coloured_figures_of_the_birds_of_the_British_Islands_(1885-1897).jpg

The European nightjar, Eurasian nightjar or just nightjar (Caprimulgus europaeus) is a crepuscular and nocturnal bird in the nightjar family that breeds across most of Europe and temperate Asia. The Latin generic name refers to the old myth that the nocturnal nightjar suckled goats, causing them to cease to give milk.