Herring Gull (argentatus & argenteus)

(last update: February 11, 2013)

Herring Gull (argenteus) A.M adult, May 2015 & December 2016, Katwijk, the Netherlands. Picture: Merijn Loeve & Mars Muusse.

Ringed as breeding adult in May 2015.

below: Herring Gull (argenteus) A.M adult, December 16 2016, Katwijk, the Netherlands. Picture: Mars Muusse.

No black on primary coverts anymore.

below: Herring Gull (argenteus) A.M adult, May 29 2015, Katwijk, the Netherlands. Picture: Merijn Loeve.

Probably 5CY bird with single dark feathers in upperwing. White tail. Herring Gull, ringed as rooftop breeding adult in municipality Katwijk. Ringed by ringing team Roland-Jan Buijs, see BLOG BUIJS (in Dutch).

Black: P5-P10. Mirror: P9-P10. PMS: 1.

Orbital: yellow. RUM: no. BOM: no. Speckling: 1-5%.