London Wildlife Trust is the only charity dedicated solely to protecting the capital's wildlife and wild spaces, engaging London's diverse communities through access to our nature reserves, campaigning, volunteering and education.
Places to go, things to see & do
Tom Bolton takes us on an evening's adventure beneath the streets of London to uncover one of their best kept secrets - the lost river Effra.
Name: Common Blue
Scientific name: Polyommatus icarus
Category: Butterflies and moths