Dead pigeon by Jean Bernard (1775-1883). Original from The Rijksmuseum. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/481473/free-illustration-image-dead-pigeon-wingsFree Image from public domain licenseTwo grackles (Carunculated Grakle) sitting on the branch of a dead tree. Etching by M. Griffith. https://www.rawpixel.com/image/13966059/image-tree-art-animalFree Image from public domain licenseA pigeon perched on the branch of a dead tree. Etching by C. M. Fessard. https://www.rawpixel.com/image/13984386/pigeon-perched-the-branch-dead-tree-etching-fessardFree Image from public domain licenseStill Life with Four Dead Birds (c. 1640 - c. 1652) by Elias Vonck https://www.rawpixel.com/image/13790130/still-life-with-four-dead-birds-c-1640-1652-elias-vonckFree Image from public domain license