MAMMALS
Cervus canadensis (Erxleben, 1777) - North American elk (Vertebrata, Mammalia, Artiodactyla, Cervidae) on Trail Ridge, Rocky Mountains National Park, northern Colorado, USA. Above: male elk. Below: female elk.
Ochotona princeps (Richardson, 1828) - American pika (Vertebrata, Mammalia, Lagomorpha, Ochotonidae) near Rock Cut on Trail Ridge, Rocky Mountains National Park, northern Colorado, USA.
Marmota flaviventris (Audubon & Bachman, 1841) - yellow-bellied marmot (Vertebrata, Mammalia, Rodentia, Sciuridae) on Trail Ridge, Rocky Mountains National Park, northern Colorado, USA.
Callospermophilus lateralis (Say, 1823) - golden-mantled ground squirrel (Vertebrata, Mammalia, Rodentia, Sciuridae) at Horseshoe Park Overlook, northeastern Rocky Mountains National Park, northern Colorado, USA.
Neotamias minimus (Bachman, 1839) - least chipmunk (Vertebrata, Mammalia, Rodentia, Sciuridae) at Horseshoe Park Overlook, northeastern Rocky Mountains National Park, northern Colorado, USA.