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In Video: Animals step on the scales for London Zoo weigh-in

Collecting the data is a tough challenge for the keepers.
Collecting the data is a tough challenge for the keepers. Collecting the data is a tough challenge for the keepers.

Penguin chicks, squirrel monkeys and lions are just some of the creatures who had their vital statistics recorded at ZSL London Zoo’s 2019 annual weigh-in.

Many of the zoo residents are endangered, so collecting the data is vital for maintaining their wellbeing.