(July 7, 2017, 1:29 PM EDT) -- MISSOULA, Mont. — Several Native American tribes, spiritual groups and tribal members sued the U.S. government on June 30 in Montana federal court to halt a plan to delist the grizzly bear population of the Greater Yellowstone ecosystem as threatened under the Endangered Species Act (ESA), 16 U.S.C. § 1531 et seq. (Crow Indian Tribe, et al. v. United States of America, et al., No. 9:17-cv-89, D. Mont.)....