You asked
Is the pentax k r good for wildlife?
Here is what the site says about that.
From Pentax K-r: Pentax K-r: A DSLR by Pentax with a 12.4-megapixel APS-C sensor, announced in 2010. Specs - Maker: Pentax - Mount: Pentax K - Sensor: APS-C, 23.5 x 15.6mm, crop factor 1.5 - Resolution: 12.4 megapixels - Stabilisation: in the body - Announced: 2010 - Type: DSLR Focal lengths on it Lenses frame like 1.5 times their focal length on full frame: 16mm like 24mm, 23mm like 35mm, 33mm like 50mm, 57mm like ...
From Wildlife and sport: Wildlife and sport: Wildlife and sport are the hardest things to photograph, and the most gear-dependent. The subject is far away, it moves fast, and it won't do it again.
Quoted from this site's pages.