A Humboldt penguin jump off scales during the annual weight-in at London Zoo in London, Britain August 24, 2016. REUTERS/Neil Hall - RTX2MU5NShow moreShow less
A Humboldt penguin jump off scales during the annual weight-in at London Zoo in London, Britain August 24, 2016. REUTERS/Neil Hall - RTX2MU7VShow moreShow less
Asiatic lions stand by a measuring ruler during the annual weight-in at London Zoo in London, Britain August 24, 2016. REUTERS/Neil Hall - RTX2MU9GShow moreShow less
A red-kneed tarantula spider is held during the annual weight-in at London Zoo in London, Britain August 24, 2016. REUTERS/Neil Hall - RTX2MUBGShow moreShow less
A zoo keeper weighs Humboldt penguins during the annual weight-in at London Zoo in London, Britain August 24, 2016. REUTERS/Neil Hall - RTX2MU81Show moreShow less
An Asiatic lion stands by a measuring ruler during the annual weight-in at London Zoo in London, Britain August 24, 2016. REUTERS/Neil Hall - RTX2MU8LShow moreShow less
A Sumatran tiger is enticed by meat during the annual weight-in at London Zoo in London, Britain August 24, 2016. REUTERS/Neil Hall - RTX2MU5IShow moreShow less
A squirrel monkey sits on a scale during the annual weight-in at London Zoo in London, Britain August 24, 2016. REUTERS/Neil Hall - RTX2MUA5Show moreShow less
The animal weigh in
London Zoo conducts its annual weigh in of the animals.