Monthly Archives: January 2014

Common Gulls – 20140130

2cy Scandinavian Herring Gull – 20140128

High concentration of ringed Black-headed Gulls in Leiden today – 20140128

Marked Birds Database update: 4 marker support and templates

Kleptoparasitic behavior in Black-headed Gulls towards Sanderlings – 20140119

Leucistic Black-headed Gull – 20140119

Re-sighting of ‘my’ 29cy Herring Gull

2cy Iceland Gull – 20140118

3cy Common Gull White E91V – 20140112

Rare observation of Black-headed Gull with Slovak ring – 20140104