Larus cachinnans
Look for a large gull with long, pale legs and a very flat crown. Its beady dark eye is a key identification feature.
For a long time, Caspian Gull was treated as part of the large Herring Gull complex. It was later recognised as a distinct species based on a combination of differences in morphology, vocalisations, behaviour, and genetic data. Today it is known as a highly adaptable gull that breeds in both inland wetlands and coastal areas.