Definition of "quawk" []

• To croak; caw.
• The qua-bird or night-heron, Nyctiardea grisea nævia. Also quark, squawk. (noun)

The Century Dictionary (Public Domain)

• "Black-crowned night-heron, Nycticorax nycticorax (protonym, Ardea Nycticorax), also known as the American/common night heron, the quawk or quark (an onomatopoeic term) or simply as the night heron, photographed at Texas City Dike, Texas (USA)."
• ""The gate is open, the brown colt's gone, the brindle calf's going and we are thinking about it; quawk! quawk!" said the three geese, Mrs. Waddle, Mrs. Gabble, and Mrs. Dabble."
• "Even their distant quawk made her quake, though she feared her end was near."