A marmot is generally a large ground squirrel. The brown marmot is the most well known.[1] (LotC 154)
In World of Warcraft[]
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Brown marmots
Marmot
In World of Warcraft, the most common type of marmot, the Lua error in package.lua at line 80: module 'Module:Factiongfx/faction_tip_link.json' not found. Brown Marmot, is only seen in the Blade's Edge Mountains area.
You can control another type of marmot besides the Brown Marmot, simply called a Lua error in package.lua at line 80: module 'Module:Factiongfx/faction_tip_link.json' not found. Marmot, when you are on the quest 
[67] The Smallest Creatures by using the [Kodohide Drum] by a cave near Bloodmaul Camp. Note that the "Brown Marmot" become the "Marmot" when controlled by a player.
The Lua error in package.lua at line 80: module 'Module:Factiongfx/faction_tip_link.json' not found. Borean Marmot can be found around the Borean Tundra.
In Ulduar, Brann Bronzebeard yells to Archmage Rhydian, "Sneak?! What do you think we are, marmots?"
Trivia[]
Brown Marmots respawn instantly when killed to prevent the quest from becoming impossible.