You asked

Is the fujifilm x pro3 good for wildlife?

Here is what the site says about that.

From Fujifilm X-Pro3: Fujifilm X-Pro3: A mirrorless camera by Fujifilm with a 26.1-megapixel APS-C sensor, announced in 2019. Specs - Maker: Fujifilm - Mount: Fujifilm X - Sensor: APS-C, 23.5 x 15.6mm, crop factor 1.5 - Resolution: 26.1 megapixels - Stabilisation: none in the body; use stabilised lenses for slow shutter speeds - Announced: 2019 - Type: mirrorless camera Focal lengths on it Lenses frame like 1.5 times their focal length on full frame: 16mm ...

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.

From these pages