I was playing Minecraft P.E and my parrots started to merge with multiple Minecraft mobs textures for seemingly no reason. They turned into donkeys, mules, what I think was a Savanna villager, a zombie and a white texture that reminded me of a ghast. Sometimes they were just invisible. What was weird, I had a donkey and a mule in my side yard of my house. I did not, however, have a Savana Villager anywhere near by, or had even ever seen a Savanna village on this world. Don't know why they did this, but this is the first time I've seen this before. No mods or data packs were used here, originally they were just, both of them, blue parrots. It was just vanilla Minecraft. (Didn't know what to flair it, you guys need a glitch flair.) Update: If they sit on my shoulder, they look like iron armor!
Source: https://www.reddit.com/r/Minecraft/comments/mgmuxs/whats_wrong_with_my_parrots/