MMU PhD student @bensecker.bsky.social is working to understand drivers of Willow tit decline in the UK:
Two retrapped Willow Tits at one of our sites this morning, in all likelihood a newly formed pair. The female (right) is an adult from one of the nests we were monitoring last year on the site. She lost her partner midway though egg-laying, presumably predated, but managed to fledge all four… (1/2)