Riparia riparia illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio version of Svenska… https://www.rawpixel.com/image/325654/free-illustration-image-von-wright-brothers-bird-vintageFree Image from public domain licenseSand martin bird png hand drawn https://www.rawpixel.com/image/2633954/free-illustration-png-bird-vintage-birds-von-wright-brothersView license61. The Purple Martin (Hirundo purpurea) 62. The Bank Swallow (Hirundo riparia) illustration from Zoology of New York… https://www.rawpixel.com/image/329342/free-illustration-image-swallow-zoology-new-york-birdsFree Image from public domain licenseRiparia riparia illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio version of Svenska… https://www.rawpixel.com/image/325946/premium-illustration-psd-america-ancient-animalView license