>>1155046I use my camera. It has an optical viewfinder so that it doesn't need to be on to use the zoom lens. Thus, I can use it merely as a spotting scope. There's also a "lens2scope" attachment you can buy to put on camera lenses to use them like a spotting scope.
>>1155074I never heard of "birding" until the internet started using it a few years ago. We've always called it "bird watching" where I live in the eastern USA. Perhaps it is a easier to type out a short word like "birding" on a phone or something.