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.
More top news
Transport secretary Chris Grayling said MPs will decide this week about where to allow airport expansion in south east England
The Met Police has thanked residents in Northolt for their patience but has warned the armed stand-off could take time to resolve.
A man said to be armed with dangerous articles remains inside an address in west London.