London Zoo animal audit - in pictures

A zookeeper strokes a penguin on a scale Photograph: Andrew Cowie/AFP/Getty Images

Meerkats stand on a weighing machine Photograph: Alastair Grant/AP

A Galapagos giant tortoise is measured Photograph: Rebecca Naden/PA

A keeper measures an African millipede Photograph: Alastair Grant/AP

Elton, a spectacled owl, sits on a scale Photograph: Facundo Arrizabalaga/EPA

A giraffe is measured using a scale attached to a wall Photograph: Rebecca Naden/PA

A Humboldt penguin is weighed and measured Photograph: Alastair Grant/AP