I would really like a bird mob. It would be speckled, blue for ocean, green for jungle and orange color for desert. At dawn and dusk, it would fly to a tree or cactus chosen when the bird spawned. It would lay a speckled bird egg, and players could take the egg and place it somewhere else to lure the bird. It could be plucked when right-clicked, to get a rainbow feather. It would drop turkey, and the eggs could be smelted into rainbow syrup, used to lure cats when placed on a tree. The syrup could also be crafted to make a trampoline which would blast you 10 blocks high.
The bird doesn't have a name, but I'd really like to see this or a trampoline in minecraft.