_Crested Goat-sucker_, Phill. Bot. Bay, pl. in p. 270. _Caprimulgus Novæ-Hollandiæ_, Lath. Ind. Orn., vol. ii. p. 588.—Less. Traité d’Orn., p. 265.—Ib. Man., t. i. p. 412.—Vieill. Nouv. Dict. d’Hist. Nat., t. x. p. 234. —— _cristatus_, Shaw in White’s Voy., pl. in p. 241. _New Holland Goat-sucker_, Lath. Gen. Syn. Supp., vol. ii. p. 261.—Shaw, Gen. Zool., vol. x. p. 170.—Lath. Gen. Hist., vol. vii. p. 341. _Bristled Goat-sucker_, Lath. Gen. Hist., vol. vii. p. 342. _Caprimulgus vittatus_, Ib. Ind. Orn. Supp., p. lviii. _Banded Goat-sucker_, Ib. Gen. Syn. Supp., vol. ii. p. 262, pl. 136.—Shaw, Gen. Zool., vol. x. p. 152, pl. 17.—Lath. Gen. Hist., vol. vii. p. 342, pl. cxv. _Ægotheles Novæ-Hollandiæ_, Vig. and Horsf. in Linn. Trans., vol. xv. p. 197.—De la Fresn. in Guerin, Mag. de Zool. 1838, p. 21, pl. 82. —— _lunulatus_, Jard. and Selby, Ill. Orn., vol. iii. pl. 149. —— _Australis_, Swains. Class. of Birds, vol. ii. p. 338. —— _cristatus_, G. R. Gray, List of Gen. of Birds, p. 7. _Little Mawepawk_, Colonists of Van Diemen’s Land. _Teringing_, Aborigines of the coast of New South Wales. This very interesting little Nightjar is subject to great variation in the colour and markings of its plumage, a circumstance which has tended to produce much confusion, and greatly to increase the list of synonyms. It possesses a great range of habitat, being found in every part of Van Diemen’s Land, and throughout the southern portion of Australia, from Swan River on the western coast to Moreton Bay on the eastern; time, and the continued exploration of that vast country, can alone determine how far it may be found to the northward: it is a stationary species, inhabiting alike the densest brushes near the coast, and the more thinly-wooded districts of the interior. While rambling in the Australian forests I had the good fortune to meet with more than an ordinary number of specimens of this curious bird. I also procured its eggs, and considerable information respecting its habits and actions, which differ most remarkably from those of the true _Caprimulgidæ_, and on the other hand assimilate so closely to the smaller Owls, particularly those comprised in the genus _Athene_, as to form as perfect an analogical representative of that group of birds as can possibly be imagined, for which reason the English name of Owlet Nightjar has been assigned to it.