Larus cachinnans in the Netherlands

(last update: August 16, 2020)

Coordinator:
Albert de Jong
Merijn Loeve
Roland-Jan Buijs
Leon Kelder
Mars Muusse

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Hybrid (?) Caspian Gull cachinnans F|N 2CY-4CY, July 2020 & March - April 2022, Lelystad, Almere & Trintelzand, the Netherlands. Picture: Eric Roeland, Mars Muusse & Daniel Beuker.

Black tibia n[F|N], ringed as pullus in season 2019 at colony Lelystad, the Netherlands.
Unmistakable some cachinnans-blood and traits, but especially the images of 3CY-March show Herring-like head shape and spring streaking.

below: Hybrid (?) Caspian Gull cachinnans F|N 4CY, April 12 2022, Lelystad colony, the Netherlands. Picture: Mars Muusse.

First local ringed bird that is returning in the colony for a serious breeding attempt? Partner is adult Caspian Gull, inspecting nest 61 together.

below: Hybrid (?) Caspian Gull cachinnans F|N 3CY, June 21 2021, Trintelzand, the Netherlands. Picture: Daniel Beuker.

PMS: P7-P10 old.

below: Hybrid (?) Caspian Gull cachinnans F|N 3CY, March 19 2021, Almere, the Netherlands. Picture: Eric Roeland.

Head shape and streaking suggest at least some Herring Gull blood in this individual.

below: Hybrid (?) Caspian Gull cachinnans F|N 2CY, July 29 2020, Lelystad, the Netherlands. Picture: Eric Roeland.

PMS: P7/-.