Read more Sacramento River stories on Newserhttp://www.newser.com/taggrid/2296/sacramento-river.htmlhttp://img1-cdn.newser.com/images/newser-black250x40.gifhttp://www.newser.com/2012 - Newseren-usNewser Feed GeneratorThu, 24 May 2012 19:33:39 CDThttp://www.newser.com/story/2570/lost-whales-heading-home-face-new-perils.htmlSam Gale Rosen<img src='http://img1-cdn.newser.com/getimage.aspx?mediaid=5466&width=45&height=45&crop=Y&updateddate=20110401034920' border='0' />The lost whales in the Sacramento River are on their way home, but may now be in danger from large ships. The mother humpback and her calf had lingered more than a week in the freshwater river, but now have made it to about 50miles from the ocean. The closer...One of two humpback whales surfaces in the Sacramento River near Rio Vista, Calif., Tuesday, May 22, 2007. Authorities spent the day trying to herd the pair, a mother and her calf, named Delta and Dawn, downstream by banging metal pipes beneath the water.(AP Photo/Rich Pedroncelli)http://www.newser.com/story/2570/lost-whales-heading-home-face-new-perils.htmlMon, 28 May 2007 12:45:13 CDT