Larry

I use and love the Sony RX10 mIV. Several folks I bird with use the Nikon P950 or P1000.. the P1000 is huge and heavy and I would not want it, I have had good images of birds if flight, as well as pretty good images of warblers hiding  in bushy trees, which  means pinpoint focus is working well. The Sony has very fast focus and is weatherproof. My friend with the P950 has had some great shots with it, they are both really good for birding. My Sony has been on trips to Spain and Costa Rica and around the US in fall and winter trips and has not had temperature or moisture issues. I got really good birds in flight in Costa Rica. I read the book by Steve Ingraham (Point and Shoot Nature Photography) on how to do bird photography with the RX 10. I very highly recommend it. My Costa Rica images are here: https://larrytheller.smugmug.com/Birds-of-Northern-Costa-Rica-2020