Minecraft wiki entry for Easter_eggs, associated text: Several items when worn on the head (using the /item replace command) have unique placements. The end rod and spyglass protrude from the head like a horn, the lightning rod sits at the side like a snorkel, fish look like an ear and mic piece, banners display similar to how pillager captains wear them, fence gates are worn like glasses, bones are held in the mouth like a dog, leads go around the eye like a monocle, and feathers stick up at the back of the head.