Horned Grebe from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from University of… https://www.rawpixel.com/image/277485/free-illustration-image-audubon-birds-america-public-domain-grebeFree Image from public domain licenseHorned grebe-in spring (Podiceps auritus) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio… https://www.rawpixel.com/image/325953/free-illustration-image-von-wright-brothers-swedish-birdFree Image from public domain licenseYoung horned grebe (PODICEPS AURITUS) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio… https://www.rawpixel.com/image/326324/free-illustration-image-von-wright-brothers-the-wrightFree Image from public domain licenseYoung horned grebe (Podiceps auritus) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio… https://www.rawpixel.com/image/326068/free-illustration-image-von-wright-brothers-bird-1900sFree Image from public domain licenseYoung horned grebe (PODICEPS AURITUS) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio… https://www.rawpixel.com/image/326192/premium-illustration-psd-america-ancient-animalView licenseYoung horned grebe (Podiceps auritus) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio… https://www.rawpixel.com/image/326123/premium-illustration-psd-america-ancient-animalView licenseHorned grebe-in spring (Podiceps auritus) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio… https://www.rawpixel.com/image/326317/premium-illustration-psd-america-ancient-animalView license