The Common Swift (Cypselus Apus) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio version… https://www.rawpixel.com/image/326085/free-illustration-image-apus-apus-von-wright-brothers-swiftFree Image from public domain licenseThe Common Swift (Cypselus Apus) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio version… https://www.rawpixel.com/image/326151/premium-illustration-psd-swift-america-ancientView license