3D anatomical structure of the endocranium of an adult scarlet macaw (*Ara macao*, OUVC 10633). Work on this project was done primarily by WitmerLab PhD student Jann Nassif. The skull was µCT-scanned with a voxel size of 90 µm (0.090 mm) at the OUµCT facility. Digital extraction of anatomical structures was done using Avizo, 3D modeling was done using Maya. For more 3D content on this specimen, check out the Visible Interactive Parrot site: http://bit.ly/1UziNv7. There you’ll find 3D PDFs for download that provide comparable content to what’s here, but allowing the user more control. For a lower resolution model, see https://skfb.ly/O8Wy. For the full skull and beak, see https://skfb.ly/M6Kn.