Pest Control Achievement Guide
Squirrel (Click for Best Directions)
Borean Frog - Borean Tundra, Around steam jets east of Taunka Village
Chicken - Arathi Basin, When Alliance control the farm or Shattrath City (In lower city 58,69)
Crab - Moaki Harbor in Dragonblight, Ryan Seacrest's Pants
Ewe - 57, 22 in Shattrath City
Frog - all over Zangarmarsh
Hare - Unique to Durotar, and all over.
Rabbit (Click for Best Directions)
Sheep - Howling Fjord Scalawag Point
Swine - Swine pen near Orgrimmar
Prairie Dog (Click for best Directions)
Steam Frog - Geysers in Borean Tundra
Cat - Silvermoon City and Elwynn Forest
Cow - Hillsbrad for Horde, Elwynn For Alliance
Deer (Click for best directions)
Fawn - Elwynn Forest
Gazelle - The Barrens
Parrot - Un'goro Crater
Ram - Loch Modan or Dun Morogh
Skunk - Terokkar Forest
Toad - Darnassus for Alliance Nagrand for Horde (North of Garadar)
Eastern Kingdoms
Huge Toad - Swamp of Sorrows
Lava Crab - Searing Gorge
Northrend
Arctic Hair - Dragonblight, Borean Tundra, Zul'Drak
Tundra Penguin - Borean Tundra (On Glacier by Murlocs)
Borean Marmot - Borean Tundra
Sholazar Tickbird - Sholazar Basin
Grizzly Squirrel - Grizzly Hills
Mountain Skunk - Grizzly Hills
Scalawag Frog - Howling Fjord (Scalawag Point)
Fjord Penguin - Howling Fjord
Fjord Turkey - Howling Fjord
Adder (Click here for best directions)
Crystal Spider - The Nexus and The Oculus
Fire Beetle - Searing Gorge or Burning Steppes
Gold Beetle - Halls of Lightning and Halls of Stone
Maggot - Naxxramas or Ghostlands
Mouse - Westfall
Roach - Western Plaguelands
Snake - The Dead Mire of Zangarmarsh
Underbelly Rat - Dalaran Sewers
Squirrel (Click here for directions)
Devouring Maggot - Howling Fjord
Fjord Rat - Guess?
Larva - Naxxramas or Ghostlands
Moccasin - Swamp of Sorrows
Rat
Scorpion - Hellfire
Spider - Ghostlands
Zul'Drak Rat - Orgrimmar, Nah just kidding.