Schoolchildren visit the Natural History Museum's butterfly exhibition – in pictures

A girl's mouth is hidden by a butterfly resting on her nose Photograph: Peter Macdiarmid/Getty Images

A girl allows a butterfly to be placed on her nose Photograph: Peter Macdiarmid/Getty Images

A boy proudly presents a butterfly on his hand Photograph: Rex Features

A boy looks startled as a butterfly lands on his nose Photograph: Jonathan Hordle/Rex Features

A boy plays with a butterfly on his hand Photograph: Peter Macdiarmid/Getty Images

A museum volunteer with a blue morpho butterfly on her nose Photograph: Gareth Fuller/PA

Two boys practice staying still as butterflies land on them Photograph: Peter Macdiarmid/Getty Images

A boy tries to catch one of the butterflies Photograph: Peter Macdiarmid/Getty Images

A girl gets a closer look as a butterfly lands on her shoulder Photograph: Peter Macdiarmid/Getty Images

Volunteer Scarlett Yianni with a blue morpho butterfly on her face Photograph: Gareth Fuller/PA