The humble dodo, this bird is great for attacking other players. You can use it as biological warfare set on wander grab with a pteradon and infect it. Once it's sicker than clinton drop it in the enemy base. Kaboom creative way to infect enemies and douch bags.
on mobile you can breed for size and if you make it small it can get on your shoulder and if you make it big you can ride it and craft a decimation bit allowing it to damage any structure including tek