Black-throated loon (Colymbus Arcticus) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio… https://www.rawpixel.com/image/326301/free-illustration-image-loon-von-wright-brothers-wrightFree Image from public domain licenseBlack-throated loon (Colymbus arcticus) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio… https://www.rawpixel.com/image/326259/free-illustration-image-duck-von-wright-brothers-vintage-animalFree Image from public domain licenseBlack-throated loon (Colymbus Arcticus) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio… https://www.rawpixel.com/image/326223/premium-illustration-psd-loon-von-wright-brothers-americaView licenseBlack-throated loon (Colymbus arcticus) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio… https://www.rawpixel.com/image/326222/premium-illustration-psd-loon-america-ancientView license