So heres my first attempt of taming a spino with a trap:

I found a Level 145 male spino near my base and gathered materials for the trap. I think i did something wrong becuase the spino didn't go into the trap. Not exactly.

I lured him to the trap with my Pteranodon, which got hurt pretty badly and i needed to land. Then i saw the spino was still free. But then he started attacking the trap and was too busy to notice me sending him into the land of his dreams.

Now i got a Level 225 Spino, named Hamilton.