..., croaking, cawing... 
Gustavo Adolfo Becquer 「Legends, Tales and Poems」
...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」
...About a mile from this place I heard a loud and confused noisesomewhere to the right of my course, and in a short time washappy to find it was the croaking of frogs, which was heavenlymusic to my ears...
Mungo Park 「Travels in the Interior of Africa, Vol. 1 [of 2]」
...The former took their departure, and he went on till past midnight, when the croaking of frogs induced him to turn off from the road, that he and his steed might quench their thirst...
W.H.G. Kingston 「Great African Travellers」
...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 hoarse, croaking, craack-craack, sometimes adeep, grunting koeer-koeer; a clucking, and a metallicklunk...
Frank M. Chapman 「Color Key to North American Birds」
...On the fence post, not far away, sat a big black raven croaking gravelyto himself...
Lenore Elizabeth Mulets 「Stories of Birds」
...I amtired of your croaking voice...
Abbie Farwell Brown 「The Curious Book of Birds」
...Lastly, when not croaking amid the foliage, the tree frogs indulge in the most graceful dives...
J. Henri Fabre Alexander Teixeira de Mattos 「The Life of the Fly」
...Lastly, when not croaking amid the foliage, the Tree-frogs indulge inthe most graceful dives...
J. H. Fabre 「The Wonders of Instinct」
...Bravely, the older man led the way towards the croaking monster...
Various 「Astounding Stories of Super-Science, June, 1930」
...We no longer heard the discordant shriek ofthe parrots, or the hoarse croaking note of the bittern...
Charles Sturt 「Expedition into Central Australia」
...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」
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