London Zoo weigh-in: Monkeys, penguins and capybaras among 10,000 animals on scales for annual health check

From snails to capybaras, monkeys to penguins, thousands of creatures have been stepping up to the scales for London Zoo’s annual “weigh-in”.The mammoth task sees keepers record the statistics of every mammal, bird, reptile, fish and invertebrate at the zoo. The measurements help to monitor health, development and identify pregnancies. But, persuading some animals to cooperate requires a little bit of creativity. Kiwi, a capybara, is lured towards the scales with food, during the annual weigh-in at ZSL London Zoo in LondonPASome are trained to step on the scales while devices for birds are hidden in doorways. A Bolivian black-capped squirrel monkey was placed on a perch for the weigh-in while brother and sister capybaras Gizmo and Kiwi were lured onto the scales with food.A Humboldt penguin is weighed during the annual weigh-in at ZSL London Zoo in LondonPAThe zoo’s smallest animals are Partula snails, which weigh less than one gramme.Measurements are added to an information system shared with conservationists across the world to provide information on endangered species.A katydid during the annual weigh-in at ZSL London Zoo in LondonPALondon Zoo’s animal operations manager Daniel Simmonds said: “Regular weigh-ins help zookeepers track the health of our animals – including insects like the magnolia land snails, the capybaras, and Humboldt penguins – and genuinely help us manage the care of these animals, who play a vital role in our global conservation efforts.”