Birdability is a bird-watching organisation based in the USA which concentrates on improving the physical accessibility of birding locations, empowering a welcoming and inclusive birding community, and introducing people with access challenges to birding or bird watching.
Here’s an excellent video which introduces the organisation:
Although the UK doesn’t have an equivalent organisation, the RSPB (Royal Society for the Protection of Birds) does work hard to make its many reserves accessible. They have a section on their website dedicated to birdwatching with a disability. The RSPB’s reserves are listed on their website and all have accessibility information against them. There are also links to external accessibility guides to their reserves, like this one that looks at their Leighton Moss reserve, in north Lancashire.
Bird watching is a hobby that you can enjoy almost anywhere. Some of the best birdwatching can be in your own garden or in a local park or open space. Every year, the RSPB runs the Big Garden Birdwatch towards the end of January, highlighting the accessibility of watching birds, but also providing a useful data gathering exercise for the organisation itself.