. Bulletin of the British Ornithologists Club. Nigel Cleere 169 Bull. 2002 122(3) proceedings for that year, which were published in May 1838 (Gould 1838a). He also described the genus and species in part 2 of his Icones Avium, which was published in August 1838 (Gould 1838b). The bill, nostrils, rictal bristles, wings, tail, tarsi and feet were described and, as a reference to the bird's unique wing shape, he named the genus Amblypterus (from the Greek words amblus, meaning dull or blunt andpterux a wing). In 1840, considered the generic name to be similar to a word used in en
. Bulletin of the British Ornithologists Club. Nigel Cleere 169 Bull. 2002 122(3) proceedings for that year, which were published in May 1838 (Gould 1838a). He also described the genus and species in part 2 of his Icones Avium, which was published in August 1838 (Gould 1838b). The bill, nostrils, rictal bristles, wings, tail, tarsi and feet were described and, as a reference to the bird's unique wing shape, he named the genus Amblypterus (from the Greek words amblus, meaning dull or blunt andpterux a wing). In 1840, considered the generic name to be similar to a word used in entomology and introduced a new name Eleothreptus (from the Greek heleothreptus, which means marsh-dwelling), the species at that time being only known from marshlands (Gray 1840). In 1866, published the generic name as Heleothreptus, and this spelling was chosen over Eleothreptus by Hartert (1892), thereby making it an unjustified emendation under ICZN (1999), Article 33 Morphological characteristics that separate this genus from Caprimulgus are a broader bill, proportionally longer rictal bristles, a short, square tail and partially feathered tarsi. Males also have strongly curved primaries, but the short secondaries. Figure 1. Wing shapes of male nightjars (from top to bottom), a European Nightjar; b White-winged Nightjar; c Sickle-winged Nightjar. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Ornithologists Club. Oxford : Clarendon Press
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