Atlantic puffin (Fratercula arctica) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio… https://www.rawpixel.com/image/326112/free-illustration-image-penguin-puffin-von-wright-brothersFree Image from public domain licenseSnowy owl (Nyctea Scandiaca) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio version of… https://www.rawpixel.com/image/326119/free-illustration-image-owl-snowy-abstractFree Image from public domain licensePng sticker eurasian tree sparrow bird hand drawn https://www.rawpixel.com/image/2627881/free-illustration-png-sparrow-bird-treeView licenseShelduck (TADORNA TADORNA) illustrated by the von Wright brothers. 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Digitally enhanced from our own 1929 folio… https://www.rawpixel.com/image/326196/free-illustration-image-seagull-gull-von-wright-brothersFree Image from public domain licenseRedwing (Turdus iliacus) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio version of… https://www.rawpixel.com/image/326172/free-illustration-image-bird-von-wright-brothers-turdus-iliacusFree Image from public domain licenseWhooper Swan (Cygnus cygnus) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio version of… https://www.rawpixel.com/image/325774/free-illustration-image-swan-von-wright-brothers-birdsFree Image from public domain licenseMerlin female (Falco aesalon) illustrated by the von Wright brothers. 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Digitally enhanced from our own 1929 folio version of… https://www.rawpixel.com/image/325756/free-illustration-image-ardea-cinerea-von-wright-brothers-birdsFree Image from public domain licensePicus canus ♂ illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio version of Svenska… https://www.rawpixel.com/image/325696/free-illustration-image-woodpecker-von-wright-brothers-birdFree Image from public domain licensePng sticker coal tit bird hand drawn https://www.rawpixel.com/image/2627838/free-illustration-png-coal-tit-bird-couple-animalView licensePng sticker crow bird hand drawn https://www.rawpixel.com/image/2627853/free-illustration-png-crow-jackdawView licenseTransparent sticker shelduck bird hand drawn https://www.rawpixel.com/image/2696906/free-illustration-png-duck-bird-vintage-birdsView licenseGolden Eagle (Aquila chrysaetos) illustrated by the von Wright brothers. 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