On the way in, I just relax and count the bird species I see. Usually it is between 8 and 12 different species, although in total I have seen many more.
See https://www.rspb.org.uk/birds-and-wildlife/bird-and-wildlife-guides/bird-a-z/b/blackbird/. The image on the LHS is on the RSPB site.
There are some waxwings in Cambridge. These birds come from Scandinavia and are quite rare most winters. I have yet to see one. They are often seen eating berries in supermarket car parks.