Willow ptarmigan (Lagopus lagopus ) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio… https://www.rawpixel.com/image/325973/free-illustration-image-von-wright-brothers-wright-birdFree Image from public domain licenseRock ptarmigan (Lagopus mutus) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio version of… https://www.rawpixel.com/image/325994/free-illustration-image-von-wright-brothers-wright-birdFree Image from public domain licenseHybrid between Black grouse and Willow ptarmigan (Yrurus tetrix x lagopus lagopus) illustrated by the von Wright brothers.… https://www.rawpixel.com/image/326328/premium-illustration-psd-america-ancient-animalView licenseWillow ptarmigan female (Lagopus lagoups) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio… https://www.rawpixel.com/image/326331/premium-illustration-psd-america-ancient-animalView licenseWillow ptarmigan male (Lagopus lagopus) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio… https://www.rawpixel.com/image/326272/premium-illustration-psd-america-ancient-animalView licenseHybrid between Black grouse and Willow ptarmigan (Lyrurus tetrix ♂ x lagopus lagopus ♀) illustrated by the von Wright… https://www.rawpixel.com/image/326039/free-illustration-image-grouse-von-wright-brothers-birdFree Image from public domain licenseRough-legged falcon png bird sticker, transparent background https://www.rawpixel.com/image/8881587/png-art-stickerView licenseRough-legged falcon bird, vintage animal collage element psd https://www.rawpixel.com/image/8881586/psd-art-vintage-illustrationsView licenseRough-legged falcon bird, vintage animal collage element psd https://www.rawpixel.com/image/8881589/psd-art-vintage-illustrationsView licenseRough-legged falcon png bird sticker, transparent background https://www.rawpixel.com/image/8881588/png-art-stickerView licenseWillow ptarmigan male (Lagopus lagopus) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio… https://www.rawpixel.com/image/326013/free-illustration-image-von-wright-brothers-century-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 licenseRough-legged Falcon from Birds of America (1827) by John James Audubon (1785 - 1851), etched by Robert Havell (1793 - 1878).… https://www.rawpixel.com/image/277297/free-illustration-image-hawk-john-james-audubon-birdFree 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 licenseArctic Fox (Vulpes lagopus) from the viviparous quadrupeds of North America (1845) illustrated by John Woodhouse Audubon… https://www.rawpixel.com/image/321911/free-illustration-image-fox-audubon-arcticFree Image from public domain licenseHand drawing of birds collection illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio version… https://www.rawpixel.com/image/326115/premium-illustration-psd-eagle-tawny-owl-sparrowhawkView licenseA ptarmigan (Lagopus mutus) in both summer and winter plumage. Colour lithograph, ca. 1875. https://www.rawpixel.com/image/13954691/image-animal-public-domain-birdFree Image from public domain licenseRough-legged falcon bird, vintage animal illustration https://www.rawpixel.com/image/8881585/image-art-vintage-illustrationsView licenseRough-legged falcon bird, vintage animal illustration https://www.rawpixel.com/image/8874711/image-art-vintage-illustrationsView licenseRough-legged Falcon from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from… https://www.rawpixel.com/image/277414/free-illustration-image-john-james-audubon-birds-america-public-domain-hawkFree 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 licenseMushroom with small thin stem. Coprinopsis lagopus is a species of fungus in the Psathyrellaceae family. Original public… https://www.rawpixel.com/image/4022190/photo-image-plant-mushroomFree Image from public domain licenseOxytropis lagopus, haresfoot locoweed. Columbus, Montana. June 7, 2006. Original public domain image from Flickr https://www.rawpixel.com/image/3335709/free-photo-image-acanthaceae-blossom-cc0Free Image from public domain licenseRough-legged Hawk (TRIORCHIS LAGOPUS) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio… https://www.rawpixel.com/image/326090/free-illustration-image-von-wright-brothers-bird-hawk-vintageFree Image from public domain licenseHybrid between Western capercaillie and Willow ptarmigan (Tetrao urogallus x lagopus lagopus) illustrated by the von Wright… https://www.rawpixel.com/image/326016/free-illustration-image-von-wright-brothers-tetrao-urogallus-birdFree Image from public domain licenseWillow ptarmigan female (Lagopus lagoups) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio… https://www.rawpixel.com/image/325958/free-illustration-image-von-wright-brothers-animals-1900sFree Image from public domain licenseHybrid between Black grouse and Willow ptarmigan (Yrurus tetrix x lagopus lagopus) illustrated by the von Wright brothers.… https://www.rawpixel.com/image/325969/free-illustration-image-von-wright-brothers-grouse-vintageFree Image from public domain licenseHybrid between Western capercaillie and Willow ptarmigan ♂ (Tetrao urogallus x lagopus lagopus) illustrated by the von… https://www.rawpixel.com/image/326212/premium-illustration-psd-america-ancient-animalView licenseHybrid between Black grouse and Willow ptarmigan (Lyrurus tetrix ♂ x lagopus lagopus ♀) illustrated by the von Wright… https://www.rawpixel.com/image/326275/premium-illustration-psd-america-ancient-animalView licenseWillow ptarmigan (Lagopus lagopus ) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio… https://www.rawpixel.com/image/326247/premium-illustration-psd-america-ancient-animalView licenseRock ptarmigan (Lagopus mutus) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio version of… https://www.rawpixel.com/image/326329/premium-illustration-psd-america-ancient-animalView licenseRough-legged Hawk (TRIORCHIS LAGOPUS) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio… https://www.rawpixel.com/image/326173/premium-illustration-psd-von-wright-brothers-america-ancientView license