What is that dinosaur like thing on halo 3 called?

[New mom as of 3/24/08]

Not the Hunters... I saw it in a preview once but i cant find itttttttt

 

[adil a]

elites jackles flood brutes parasites grunts commander in chief?...that all i got

 

[arachi_33]

I don't know i don't know how someone would know.

 

[Brandon S]

They are called jackles

 

[oSiK]

If it is sort of like a tall robot machine, I think you might be talking about the scarab. If you are talking about characters, I think you might be talking about Jackels.