A Wisconsin zoo said two river otters, Louie and Ophelia, weaseled their way out of their enclosure last week during a winter storm, as the search continued Tuesday.

Two otters named Louie and Ophelia escaped from a zoo in Wisconsin during a winter storm after leaving through a 'small breach in buried fencing that they managed to enlarge.' The NEW Zoo & Adventure Park announced in a Facebook post that a professional tracker is searching for the animals.

A pair of North American river otters at the New Zoo Adventure Park in Green Bay, Wisconsin, decided to take an unauthorized field trip during a snowstorm. The otters, named Louie and Ophelia, enlarged an opening in their enclosure and escaped.