is there something different about 2020 (apart from Covid19) I’ve never seen so many birds in my garden or so many nesting birds. Blue tits, great tits, goldfinches, robins, an occasional wren, blackbirds, dunnocks and jays, magpies and woodpeckers but not often. Even heard a cuckoo yesterday.
I think the thing to take on board is, very often its a combination of factors that have an influence, and all the aforementioned will be contributory.
As far as bird life here is concerned, not much noticeable change, however, for the first time, foxes are becoming more prevalent during the daytime (which reminds me I've vids to edit and upload), and I'm out in the garden more!
I will also here, we are impacted by the destruction of open countryside and woodland for the construction of HS2, so for me, it is difficult to define, but definitely not something I'd rule out.