Chestnut-crowned Pomatorhinus (Pomatorhinus ruficeps) illustrated by Elizabeth Gould (1804–1841) for John… https://www.rawpixel.com/image/321439/free-illustration-image-vintage-century-birdFree Image from public domain licenseRufous-headed Warbler (Cysticola ruficeps) illustrated by Elizabeth Gould (1804–1841) for John Gould’s (1804… https://www.rawpixel.com/image/321465/free-illustration-image-gould-australia-centuryFree Image from public domain license