Western yellow wagtail (Motacilla [budytes] flava) illustrated by the von Wright brothers. Digitally enhanced from our own…
https://www.rawpixel.com/image/326303/free-illustration-image-von-wright-brothers-wagtail-high-resolution-cc0-art-birdFree Image from public domain license
Great black-backed gull (Larus Marinus) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio…
Spotted Nutcracker (Nucifraga caryocatactes) illustrated by the von Wright brothers. Digitally enhanced from our own 1929…
https://www.rawpixel.com/image/326079/free-illustration-image-von-wright-brothers-nutcracker-nucifraga-caryocatactesFree Image from public domain license
Pied Wagtai Male ♂ (MOTACILLA ALBA) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio…
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