Red-necked Grebe from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from University… https://www.rawpixel.com/image/277354/free-illustration-image-audubon-birds-america-public-domain-grebeFree Image from public domain licenseYoung red-necked grebe (Podiceps grisegena) illustrated by the von Wright brothers. Digitally enhanced from our own 1929… https://www.rawpixel.com/image/326220/free-illustration-image-von-wright-brothers-1900s-public-domainFree Image from public domain licenseYoung red-necked grebe (Podiceps grisegena) illustrated by the von Wright brothers. Digitally enhanced from our own 1929… https://www.rawpixel.com/image/326224/premium-illustration-psd-america-ancient-animalView license