You asked
Is the tamron 70 210mm f 4 di vc usd good for wildlife?
It's a sensible first telephoto for wildlife, but it has limited reach. On full frame it tops out at 210mm, and on a Nikon APS-C body like the Nikon D500 it frames like about 315mm, which helps a lot for distant animals. It's stabilised and autofocuses, and f/4 is bright enough for early mornings and shade.
If you want more reach for small or far-off subjects, the Tamron SP 70-300mm f/4-5.6 Di VC USD goes further. Wildlife is the hardest thing to shoot, so the wildlife and sport guide is worth reading before you buy. If you're unsure whether a long lens suits you, buying used explains how to try one cheaply.
Written by Claude from this site's pages.