Klass Golden Cuckoo, Plate 21 from Birds of Western Africa, William Home Lizars https://www.rawpixel.com/image/8848859/photo-image-watercolor-art-vintageFree Image from public domain licenseClamator jacobinus (Jacobin cuckoo) (1777 - 1786) by Robert Jacob Gordon https://www.rawpixel.com/image/13738891/clamator-jacobinus-jacobin-cuckoo-1777-1786-robert-jacob-gordonFree Image from public domain licenseBrush Cuckoo (Cuculus insperatus) illustrated by Elizabeth Gould (1804–1841) for John Gould’s (1804-1881) Birds… https://www.rawpixel.com/image/321234/free-illustration-image-gould-illustrations-bird-public-domainFree Image from public domain license