A killer whale, who swam with her dead newborn for more than two weeks almost two years ago, is pregnant again. Known as Tahlequah, she isn't the only one expecting. As per sea life research group SR3, drone photos have spotted other pregnant killer whales since July. According to the group, a large number of recent pregnancies have not been successful. Various studies by the University of Washington linked these failures to lack of nutrition and access to Chinook salmon prey. The group shared photos of Tahlequah and L72, showing their body sizes in September and now in July. Killer whales are believed to be pregnant for about 17 to 18 months.