Common cuckoo-male (Cuculus canorus) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio… https://www.rawpixel.com/image/326161/free-illustration-image-cuckoo-cuculus-canorus-von-wright-brothersFree Image from public domain licenseCommon cuckoo-male (Cuculus canorus) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio… https://www.rawpixel.com/image/326166/premium-illustration-psd-cuculus-canorus-cuckoo-von-wright-brothersView licenseCommon cuckoo bird png hand drawn https://www.rawpixel.com/image/2627956/free-illustration-png-cuculus-canorus-von-wright-brothers-animal-pngView licenseCommon cuckoo-female ♀ (Cuculus canorus) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio… https://www.rawpixel.com/image/325984/free-illustration-image-cuculus-canorus-cuckoo-von-wright-brothersFree 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 licenseCommon cuckoo-female ♀ (Cuculus canorus) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio… https://www.rawpixel.com/image/325871/premium-illustration-psd-von-wright-brothers-cuckoo-bird-americaView licenseThe birds of Great Britain; Cuculus Canorus (1873) print in high resolution by John Gould. Original from The Cleveland… https://www.rawpixel.com/image/3149522/free-illustration-image-animal-antique-artFree Image from public domain licenseKoekoek (Cuculus canorus) (1596 - 1610) by Anselmus Boëtius de Boodt and Elias Verhulst https://www.rawpixel.com/image/13742847/image-paper-frame-watercolorFree Image from public domain license