Little Grey Bittern (Ardetta stagnatilis) illustrated by Elizabeth Gould (1804–1841) for John Gould’s (1804… https://www.rawpixel.com/image/321646/free-illustration-image-bird-john-gould-animal-birds-australiaFree Image from public domain licenseChinese Little Bittern illustration. Digitally enhanced from our own original edition of Pictorial Monograph of Birds (1885)… https://www.rawpixel.com/image/434975/free-illustration-image-chinese-vintage-art-1800sFree Image from public domain licenseMinute Bittern (Ardetta pusilla) illustrated by Elizabeth Gould (1804–1841) for John Gould’s (1804-1881) Birds… https://www.rawpixel.com/image/321339/free-illustration-image-vintage-australia-animalsFree Image from public domain license