the black-headed gull, the kittiwake and the Mediterranean gull. Two species, the lesser black-backed gull and herring gull, have taken a particular liking to urban environments. Dubbed ‘flying ...

common gull and black-headed gull. During the colder months, small numbers of Mediterranean gulls, scarcely seen in Hertfordshire, also fly in, the trust said. "A majority of these species are ...