Monthly Archives: October 2016

Celebrating my 200th ringed Black-headed Gull and 1600 sightings in Leiden

1CY Caspian Gull – 20161014

Announcing the release of the Marked Birds Database

Gull watching 8 – 9 October 2016

Adult Herring Gulls displaying pair-bonding behavior in October – 20161009

1CY Caspian Gull Yellow X183 – 20161007

Caspian Gulls – 20160930