Thibaut Chansac and Stanislas Wroza endured a testing day on a Paris landfill, eventually clinching an elusive 'black-backed gull' as France's second Kelp Gull.
Josh Jones takes a look at the increasing occurrence of the African subspecies of Kelp Gull in the Western Palearctic and suggests that it's only a matter of time before one makes it to our shores.
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