...I have also caughtthem preparing and eating sea gulls, terns, blue heron, egret andeven the bittern... 
William T. Hornaday 「Our Vanishing Wild Life」
...It is very different from the Least Bittern,having a more uniform chestnut coloration, especially on the under parts...
Chester A. Reed 「The Bird Book」
...The Australian Bittern, also our one representative of a cosmopolitangenus, skulks in a bed of reeds...
John Albert Leach 「An Australian Bird Book」
...Cory Bittern (Ardetta neoxena)...
Frank M. Chapman 「Color Key to North American Birds」
...Remember, that a winged bittern or heron mightpeck out his eye...
Dinks, Mayhew, and Hutchinson 「The Dog」
...—Friedmann, Griscom, and Moore (1950:34) listed the American Bittern from the "extreme northern part" of Coahuila...
Emil K. Urban 「Birds from Coahuila, Mexico」
...Willughby, who wrote about the same time, 1676, says:'The Bittern, or Mire-drum, it is said, makes either three or fiveboomings at a time—always an uneven number...
Rev. C. A. Johns 「British Birds in their Haunts」
...The Least Bittern is usually seenjust before or after sunset...
Various 「Birds Illustrated by Color Photography [February, 1898]」
...Even thepoor bittern and heron, harmless andworthless, flap to and fro from one toanother now unsafe retreat, in constantdanger of death from every booby gunnerwho can cover their slow flight...
Rowland E. Robinson 「In New England Fields and Woods」
...--Spotted Bittern...
Charles Sturt 「Expedition into Central Australia」
...--The Bittern...
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」
...On our first arrivalat the Depot there was a bittern, Ardetta flavicollis, that frequentedthe creek in considerable numbers...
Charles Sturt 「Expedition into Central Australia」
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