You asked
Is the olympus m zuiko 75 300mm f 4 8 6 7 ii good for wildlife?
Yes, for a lot of wildlife it's a sensible pick. On Micro Four Thirds it frames like 150-600mm on full frame, which is serious reach, and it's small and light enough to carry all day. The catch is the aperture: f/4.8-6.7 is slow, so it wants good light, and it isn't stabilised, so keep your shutter speed up. If you're new to long lenses, wildlife and sport explains what to expect.
Good bodies to pair it with from the list it fits:
Since good lenses hold their value well, buying used is a cheap way to try this focal range first.
Written by Claude from this site's pages.