Ruffed Grouse from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from University of… https://www.rawpixel.com/image/277545/free-illustration-image-audubon-birds-america-birdFree Image from public domain licenseWillow Grouse, or Large Ptarmigan from Birds of America (1827) by John James Audubon, etched by William Home Lizars.… https://www.rawpixel.com/image/277382/free-illustration-image-audubon-bird-birds-america-public-domainFree Image from public domain licenseAmerican Ptarmigan and White-tailed Grous from Birds of America (1827) by John James Audubon (1785 - 1851), etched by Robert… https://www.rawpixel.com/image/277493/free-illustration-image-audubon-birds-america-public-domain-vintageFree Image from public domain licensePinnated Grouse from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from University… https://www.rawpixel.com/image/277253/free-illustration-image-chicken-bird-audubonFree Image from public domain licenseSpotted Grouse from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from University… https://www.rawpixel.com/image/277311/free-illustration-image-audubon-bird-vintageFree Image from public domain licenseRock Grous from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from University of… https://www.rawpixel.com/image/277443/free-illustration-image-audubon-birds-america-public-domain-birdFree Image from public domain licenseSharp-tailed Grouse from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from… https://www.rawpixel.com/image/277412/free-illustration-image-audubon-birds-america-public-domain-grouseFree Image from public domain licenseCock of the Plains from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from… https://www.rawpixel.com/image/277391/free-illustration-image-audubon-sage-birds-america-public-domainFree Image from public domain licenseLong-tailed or Dusky Grous from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from… https://www.rawpixel.com/image/277470/free-illustration-image-john-james-audubon-birds-america-public-domain-birdFree Image from public domain licenseWillow ptarmigan (Lagopus lagopus): male and female with chicks. Reproduction of a painting by J. J. Audubon, ca. 1827. https://www.rawpixel.com/image/14005914/image-cat-cartoon-artFree Image from public domain license