Great for then swamps, reasonable jump height and swimming speed make great leech hunters. You can use them to lure leeches out of the swamp and then barrel roll them with a pteranadon. They are also good in swamps because they can harvest berries, good for getting plant species X seeds.
Forgive me if I’m wrong but I find these guys perfect for starting our especially on extinction. First tame I got and so far haven’t had or felt the need to get another tame. Perfect for out running them bowling balls that chase your tames. ( just lead it to a wild Dino then your good ) just put levels into weight and movement speed I find is best. Great for metal runs early on. Perfect start tame
Iguanodon is a very useful dino. Its strong, fast, have a lot of stamina, can jump really high, can collect a ton of berries, can turn it to seeds, when u need, and poop for u big eggs. :D A must-have creature in the game.