Annual Weigh-in At London Zoo

England Europe Giant Hooded Katydid Great Britain London London Zoo Regent's Park UK United Kingdom ZSL Zoo Zoological Society of London animal animal welfare animals annual captivity measurement measuring weigh in weigh-in weighing London United Kingdom August 19 2025 Giant Hooded Katydid ZSL London Zoo annual weigh-in animal weighing photocall keepers vital statistics health monitoring general well-being WIktor Szymanowicz NurPhoto animal care zoo management insect weighing scale animal health wildlife conservation zoological society species monitoring animal records zoo event animal welfare data collection London event wildlife photography entomology insect conservation zoo keepers animal statistics.