Humboldt penguins gather around keeper Jess Jones as she weighs them at ZSL London Zoo, in London, England on August 25, 2022. The annual weigh-in is an opportunity for keepers to make sure the information they've recorded is up-to-date and accurate, with each measurement then added to the Zoological Information Management System, a database shared with zoos all over the world that helps zookeepers to compare important information on thousands of endangered species. Photo: VCG