Marked Birds Database – Version 2.12.0 available

Filming Lesser-Blacked Gull YDDD in flight and matching it with its GPS data

Marked Birds Database – Version 2.11.1 available (fix for version 2.11.0)

The return of Lesser Black-backed Gull Green YAPC – 20200827

Marked Birds Database – Version 2.11.0 available

IJmuiden Lesser Black-backed Gull GPS-project update – 20200814

Marked Birds Database – Version 2.10.0 available

Marked Birds Database – Version 2.9.1 available

Marked Birds Database – Version 2.9.0 available

Eye close-ups of adult Herring Gulls and Lesser Black-backed Gulls – 20200529