So, my cousin and I were playing Minecraft in a mob arena, (as seen in the screenshot). When I spawned in a zombie I saw a.. a.. BABY ZOMBIE RIDING A CHICKEN! I think this is BIZARRE! o_O Don't you think? Like, it's pretty rare..:p
Lol it's called a jockey xD It's really funny you can have all kinds of mobs ride all kinds of mobs with /summon, too... I had herobrine riding a tiny slime once
Chicken jockey. Has a chance to spawn every time a baby zombie successfully spawns and is quite annoying. Immune to fall damage, very quick, and can also spawn in the nether as a baby pigman variant. If the baby is killed, the chicken will lose its speed and revert to normal chicken activities. . - Your friend, the not-wiki Twage. (Seriously, I recited this from memory. I have a problem.)