* Agatha, the zoo's Mexican red knee tarantula, is probably 25 to 30 years old. Zoo-keepers think she was donated by a woman whose son went away to college and didn't want to bring his pet ...

Katie a Mexican Redknee Tarantula is weighed during London Zoo's Annual Weigh In, in London, Thursday, Aug. 24, 2023. “We have critically endangered animals here,” she said.