White-backed woodpecker 1♀ , 2♂ (Dryobates leucotus) illustrated by the von Wright brothers. Digitally enhanced from our own…
https://www.rawpixel.com/image/325980/free-illustration-image-von-wright-brothers-bird-white-backed-woodpecker-vintageFree Image from public domain license
Tyto alba guttata owl illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio version of Svenska…
Brambling (Fringilla Montifringilla) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio…
https://www.rawpixel.com/image/325647/free-illustration-image-von-wright-brothers-birds-the-von-brothers-fringillaFree Image from public domain license