...In the evening hush could be heard the buzzing of insects and the croaking of the frogs... 
Vicente Blasco Ibanez Charlotte Brewster Jordan 「The Four Horsemen of the Apocalypse」
...The birds were venturing forth from their retreats in order to wing their way among the crows croaking wrathfully above the closed tombs...
Vicente Blasco Ibanez Charlotte Brewster Jordan 「The Four Horsemen of the Apocalypse」
...A croaking, wheezy whistle, like the sound of a cart wheel thatneeds axle-grease, expresses whatever pleasure they may have in life...
Neltje Blanchan 「Birds Every Child Should Know」
...A high whistling made by wings inflight, probably also a low croaking as in No...
Frank M. Chapman 「Color Key to North American Birds」
...They tried it after much coaxing and croaking; but their long, awkwardtoes missed their hold upon the slender branch on which she wasbalancing delicately—just as she expected it to happen...
William J. Long 「Wood Folk at School」
...A croaking cry came from oneand as another raised his tube-and-handle, something flicked from itthat burst close beside Norman...
Various 「Astounding Stories of Super-Science, August 1930」
...The last stair—the roof-openingabove; and then from beneath a great croaking cry swelled instantlyinto chorus of a alarmed shouts...
Various 「Astounding Stories of Super-Science, August 1930」
...These noisy birds(Plyctolophus Leadbeaterii) kept incessantly screeching to their young,which answered them in notes that resembled the croaking of frogs, morethan anything else...
Charles Sturt 「Expedition into Central Australia」
...We no longer heard the discordant shriek ofthe parrots, or the hoarse croaking note of the bittern...
Charles Sturt 「Expedition into Central Australia」
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