In the UK there's a Govt research lab with a modified missle radar set up to track birds. It has X and Y band and was imported from the US.
Being used at a far north RAF station to track Geese (Canada I think) and Gulls near ABZ too.
In terms of daily risk operating in the UK I'd put Birds second to MAPADS with runway incursion slipping as education improves.
If you fly a twin and take birds in both - who ya gonna call?
Sir George Cayley