Rare Mammal Moments documents through photography rare biological, behavioral or ecological events in the Greater Yellowstone Ecosystem. Photographs might include a good documentation of happenings in everyday life that most people never get to observe. For example a coyote and grizzly climb trees, porcupine quills in a grizzly, bobcats swimming and fishing, eagles fighting coyotes, weasels preying on packrats, Canada lynx, leaping fox and bobcats, dueling coyotes, cougars, badgers fighting fox, albino elk, skunks, elk antlers and more.Over 300 photographs of what mammals do when you are not looking; their secret lives. Photographs of seldom seen moments captured by roving cameras. Dr. Jim Halfpenny has been teaching in Yellowstone National Park since 1970. He specializes in carnivore ecology, winter ecology and footprint tracking. Jim also teaches programs in and about the Arctic including northern lights, crossing the northwest passage, living in Greenland and polar bears. Jim has taught bear programs everywhere in North America that there is a different kind of bear – black, brown, grizzly and polar. Jim is president of A Naturalist's World (ANW), an ecological education company (www.Tracknature.com), that runs the Track Education Center in Gardiner, Montana. ANW runs the largest wildlife tracking forensic museum (www.TrackSceneInvestigation.com) in the world. Jim is author of over 30 books and video programs including A Field Guide to Tracking North America, the Scats and Tracks series, Winter: An Ecological Handbook, Yellowstone Wolves in the Wild, Yellowstone Bears in the Wild, Badgers of Lamar Valley: Yellowstone National Park and more. He is co-creator and archivist for the Yellowstone Wolf Family Tree on Ancestry.com (see Leo's biography). He is a research fellow of the Institute of Arctic and Alpine Research, a fellow of the Explorer's Club and a Vietnam Veteran. Leo Leckie has been working at the north entrance to Yellowstone National Park since 2010. He is a guide for Yellowstone Wolf Tracker (www.WolfTracker.com) and co-creator and archivist for the Yellowstone Wolf Family Tree on Ancestry.com, where guests can learn about the relationships and life stories of Yellowstone’s restored wolves from 1995 to the present day. To become a guest of the family tree, go to www.WolfGenes.info, select the Ancestry tab and follow the instructions to receive an invitation. Leo also writes for Yellowstone Reports (www.YellowstoneReports.com) and serves on the Bear Creek Council; an all-volunteer, grassroots organization working to conserve and protect the integrity of the unique wildlife and environment at the north entrance to Yellowstone National Park. Leo is co-author of the book, Badgers of Lamar Valley: Yellowstone National Park (2012), a citizen science-based publication with maps and information about the numbers and families of badgers from 2004 to 2012. It covers interactions with coyotes and wolves and provides a detailed analysis of badger behavior. Leo has been writing stories lately about the history and biology of Yellowstone's wolves which you may find on his Facebook page (www.facebook.com/leo.leckie).