Guttural Pachycephala (Pachycephala gutturalis) illustrated by Elizabeth Gould (1804–1841) for John Gould’s… https://www.rawpixel.com/image/321252/free-illustration-image-elizabeth-gould-birdFree Image from public domain licenseBlack-tailed Pachycephala (Pachycephala melanura) illustrated by Elizabeth Gould (1804–1841) for John Gould’s… https://www.rawpixel.com/image/321108/free-illustration-image-elizabeth-gould-australia-illustrationsFree Image from public domain licenseGilbert’s Pachycephala (Pachycephala Gilbertii) illustrated by Elizabeth Gould (1804–1841) for John… https://www.rawpixel.com/image/321100/free-illustration-image-bird-elizabeth-gould-australiaFree Image from public domain licenseRed-throated Pachycephala (Pachycephala rufogularis) illustrated by Elizabeth Gould (1804–1841) for John Gould’s… https://www.rawpixel.com/image/321068/free-illustration-image-elizabeth-gould-1800s-public-domain-birdFree Image from public domain licenseBanded Thickhead (Pachycephala pectoralis) illustrated by Elizabeth Gould (1804–1841) for John Gould’s (1804… https://www.rawpixel.com/image/321109/free-illustration-image-bird-animal-centuryFree Image from public domain licenseGrey-tailed Pachycephala (Pachycephala glaucura) illustrated by Elizabeth Gould (1804–1841) for John Gould’s… https://www.rawpixel.com/image/321072/free-illustration-image-elizabeth-gould-bird-australiaFree Image from public domain licenseOlivaceous Pachycephala (Pachycephala olivacea, Vig&Horsf) illustrated by Elizabeth Gould (1804–1841) for John… https://www.rawpixel.com/image/321103/free-illustration-image-elizabeth-gould-australia-birdFree Image from public domain licenseShrike-like Phachycephala (Pachycephala Lanoides) illustrated by Elizabeth Gould (1804–1841) for John Gould’s… https://www.rawpixel.com/image/321099/free-illustration-image-bird-australia-1800sFree Image from public domain licensePlain-coloured Pachycephala (Pachycephala simplex) illustrated by Elizabeth Gould (1804–1841) for John Gould’s… https://www.rawpixel.com/image/321102/free-illustration-image-elizabeth-gould-bird-illustrationsFree Image from public domain licenseLunated Pachycephala (Pachycephala falcata) illustrated by Elizabeth Gould (1804–1841) for John Gould’s (1804… https://www.rawpixel.com/image/321098/free-illustration-image-bird-gould-illustrationsFree Image from public domain license