Pelicans have been living in St James's Park for nearly 350 years. They were first introduced in 1664, as a gift to King Charles II from the Russian Ambassador.
The existing pelicans are gregarious creatures and can often be seen climbing out of the lake to sit on benches alongside visitors.
One rather mischievous bird used to fly over to London Zoo in Regent's Park to steal their fish for his lunch.
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Here's a borough-by-borough breakdown of the official figures.