At the Zoological Society of London, staff conducted their annual weighing of penguins on Monday as part of a routine health monitoring process. The exercise, which took place at London Zoo, involves carefully coaxing the birds onto scales to record their weight.

Regular measurements of the animals help zookeepers track their health and development throughout the year. Changes in weight can provide early indications of pregnancy or alert staff to potential medical issues.

This annual event is one of several efforts by the zoo to ensure the well-being of its animal residents. By maintaining detailed records of physical changes, caretakers aim to optimize the care and conservation of the species under their supervision.