...A booming bittern I know sits hour after hour, almost every day insummer, year after year, on a dark, decaying pile of an old dock inthe creek... 
Neltje Blanchan 「Birds Every Child Should Know」
...The Least Bittern usually weaves a platform nestof reeds among rushes growing in the water and lays four or five bluishwhite eggs...
Frank M. Chapman 「Color Key to North American Birds」
...—Friedmann, Griscom, and Moore (1950:34) listed the American Bittern from the "extreme northern part" of Coahuila...
Emil K. Urban 「Birds from Coahuila, Mexico」
...The Least Bittern is usually seenjust before or after sunset...
Various 「Birds Illustrated by Color Photography [February, 1898]」
...American Bittern...
Harrison B Tordoff 「Check-list of the Birds of Kansas」
...Least Bittern...
Harrison B Tordoff 「Check-list of the Birds of Kansas」
..., his story of a least bittern, ...
John Burroughs 「Ways of Nature」
...We no longer heard the discordant shriek ofthe parrots, or the hoarse croaking note of the bittern...
Charles Sturt 「Expedition into Central Australia」
...--Spotted Bittern...
Charles Sturt 「Expedition into Central Australia」
...On our first arrivalat the Depot there was a bittern, Ardetta flavicollis, that frequentedthe creek in considerable numbers...
Charles Sturt 「Expedition into Central Australia」
...--The Bittern...
Charles Sturt 「Expedition into Central Australia」
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