Nikon D7000 camera lenses?

What is a really good ultra zoom lens for Nikon D7000 DSLR camera? Preferably under $400.00 (US dollars) lol! I'm needing one for going to a zoo, or somewhere when the focal object(s) would be very far away.

Any Nikkor AF, AF-I or AF-S lens.

An "ultra-zoom" like a 18-200 mm or 18-300 mm lens will cost you closer to a grand.

Here is a list of all the lenses your camera can use.

http://www.nikonusa.com/...index.page

There's a 55-200 mm lens that will fit into your budget