美洲旱獭（学名 Marmota monax）又称北美土拨鼠，是一种啮齿目，松鼠科动物。其毛呈灰褐色，体态肥胖，一般北美土拨鼠体长40到65厘米，重约2到4千克，一些大型的品种体长达80厘米，重14千克。其前爪灵活有力，擅长挖洞。这种土拨鼠广泛分布于北美洲。

The groundhog (Marmota monax), also known as a woodchuck, or whistlepig, is a rodent of the family Sciuridae, belonging to the group of large ground squirrels known as marmots. The groundhog is also referred to as a chuck, wood-shock, groundpig, whistler, thickwood badger, Canada marmot, monax, moonack, weenusk, and red monk. The name "thickwood badger" was given in the Northwest to distinguish the animal from the prairie badger. Monax was an Indian name of the woodchuck, which meant "the digger". Young groundhogs may be called chucklings. Other marmots, such as the yellow-bellied and hoary marmots, live in rocky and mountainous areas, but the groundhog is a lowland creature. It is widely distributed in North America and common in the northeastern and central United States and Canada. Groundhogs are found as far north as Alaska, with their habitat extending southeast to Georgia.