We sometimes look at species that are with us all year round and miss the fact that our populations are often changing. A species may always be present, but individuals can be very mobile.
Richard Bonsor, a local naturalist, posted this picture of a Black-headed Gull on Facebook last week. From its leg ring, he had been able to trace its amazing journey.
Richard Bonser to Friends of Erith Marshes
I saw this Black-headed Gull SN2N on Thamesmere, Thamesmead (London UK) on 3rd March 2018 – it was ringed at Jakuševec dump, Zagreb, Croatia on 26th February 2017 and seen in Mannheim, southwest Germany on 23rd December 2017. And then yesterday, just 22 days after my sighting, it was on the River Nemiga, Minsk, Belarus – 1,165 miles in 22 days!
Pete's Favourite Things 