Annual Weigh-in At London Zoo

England Europe Great Britain London London Zoo Regent's Park UK United Kingdom ZSL Zoo Zoological Society of London animal animal welfare animals annual captivity capybara measurement measuring weigh in weigh-in weighing London United Kingdom August 19 2025 zookeeper capybaras annual weigh-in ZSL London Zoo animals vital statistics health monitoring well-being WIktor Szymanowicz NurPhoto photocall zoo keepers record keeping animal care wildlife animal health zoological conservation species monitoring animal welfare London Zoo data collection animal management zoo animals weight measurement animal statistics zoo event animal monitoring zoology animal research animal science capybara care.