FILE - In this July 20, 2010 file photo, a young loon gets a ride on its mother's back as its sibling follows along in the waters of Mirror Lake in Calais, Vt. Once endangered, loons are among a number of species that had once all-but disappeared from Vermont which are making a comeback. Biologists and conservationists met Thursday, Oct. 23, 2014, in Burlington to mark the 40th anniversary of the Endangered Species Act. (AP Photo/Toby Talbot, File)