You asked
Is the pentax k 5 ii good for wildlife?
The K-5 II can do wildlife well, mainly because of its APS-C crop. A 300mm lens frames like 450mm on this body, so you get a lot of reach for the money. The camera also has in-body stabilisation, which helps when you're hand-holding a long lens.
For reach, I'd start with the Pentax HD D FA 150-450mm f/4.5-5.6 ED DC AW, which frames like 225-675mm. If you want a fixed focal length, the [Pentax smc DA* 300mm f/4 ED [IF] SDM](/gear/lenses/pentax-smc-da-300mm-f-4-ed-if-sdm/) is a solid choice. For a cheaper start, try the Pentax HD DA 55-300mm f/4-5.8 ED WR.
Wildlife is gear-hungry, so read wildlife and sport first, and consider buying used to try a long lens without losing much money.
Written by Claude from this site's pages.