I went on a site on this topic but can't remember the name, If I'll remember I will let you know.

Why not look into any of the various 'locust swarm' grasshoppers? There's a lot of interesting research into what makes those Acridid grasshoppers swarm, and their various life cycles. Here's a link that might spur your interest..

http://bugguide.net/node/view/98442

I'm do a biology project and I need to pick one species from order Orthoptera

and talk about the body plan, life cycle, habitat, and the niche of that species but when I look up specific species online I don't get much of that info, also the library wasn't that helpful :\ does anyone know a website or know about grass hoppers and can help me?

I also need to do this for Hymenoptera, Coleoptera, Lepidoptera, and Asteroidea

^^^ (thought I'd throw that in just in case)