Spotted Nightjar
Eurostopodus argus
One of the larger and more colourful of the nightjars, the intricate, heavily spotted and flecked patterns of the spotted nightjar enable it to blend perfectly where red, grew or brown soils are strewn with rocks, leaves, branches and twigs. Similar in appearance to two other Australian nightjar species, the large-tailed nightjar (Caprimulgus macrurus) and white-throated nightjar (Eurostopodus mystacalis), an adult spotted nightjar in flight displays large white spots on four outer primary feathers, lacking the white tail markings of the more tropical large-tailed nightjar. Voice: A typical breeding call of the spotted nightjar involves about 9-12 notes, ascending in frequency and pitch, then proceeded by a series of gobbling sounds. When on ground, approaching their nesting area, birds may emit frog-like croaking and low cooing noises.
ID text from Wikipedia, CC BY-SA 4.0
White-throated Nightjar
Eurostopodus mystacalis
E. mystacalis is the largest Australian nightjar species and measures around 30–37 cm. Males and females are very similar in appearance and display a dark variegated body. The upper body and wings are greyish-brown with broad blackish-brown streaks and spots. The underbody is spotted brown or greyish white and barred rufous. The upper part of the wing is greyish-white but speckled brownish-black as well. Its neck is buff colored with a large white patch on either side of its throat making it appear as if it's wearing a collar. Voice: White-throated nightjars are often heard more than seen. They have a distinct song that help distinguish it from species it was previously conspecific to. Mostly made by males, their song is composed of a series of rapidly ascending bubbling notes. Their song is described as wow-wow-wow-wow-ho-ho ho-ho-o-o-O containing 9-12 notes and lasting for three to six seconds.
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: Spotted Nightjar and White-throated Nightjar.