England’s capital city of London is a place of wonder, but head below the streets to the underground Tube stations and things get a bit, well, grim. It’s loud, crowded , and always seems to smell of burnt hair, and yet a host of curious creatures have made a home in those long and winding tubes (and no, we’re not talking about you, pint gremlins). The rest of this article is behind a paywall. Please sign in or subscribe to access the full content.

Stand for a moment between trains and you might be lucky enough to spot the darting black dots that are London’s Tube mice. Sit for too long, however, and you might be unlucky enough to get bitten by the “London Underground mosquito,” an overseas visitor that’s adapted to a life subterranean by *checks notes* developing a taste for human blood

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