The RSPB has a really great website. (That’s the Royal Society for the Protection of Birds.) This link is to the page where you can look up birds by name.
The pictures might only let you recognise a bird if you are very lucky but the sounds are great. I would like to reproduce some here but you can listen to any you want on the RSPB site.
The first one you play will startle you, making you suspect there’s a bird trapped in your room. It’s a mildly amusing trick to play on anyone else who doesn’t know what you are doing…..
If you live in the UK, you can volunteer to take part in the British Trust for Ornithology survey, a piece of research based on people’s reports of what birds they can see on a given day.