LANSING, Mich. (WILX) – Three North American river otter pups were born in Lansing on Feb. 2. Potter Park Zoo announced on Tuesday that their North American river otter named Nkeke had her fourth litter and her second set of triplets. The otter pups underwent a quick physical examination to assess their health and development. The zoo said the otters weighed 113 grams, 109 grams, and 96 grams.