Pets of Unusual Proportion, Once Tamed
(*) personally verified as of 11/20/13
Smaller than usual1. Crane: (minipet size at low levels, but apparently "grow up")
Whitefeather Crane* – white (Panadren only, 5 Singing Pools on Wandering Isle)
2. Bird of Prey: (slightly larger than minipet)
Rustberg Gull* - seagull (1-5 Tol Barad Peninsula)
Saltspray Gull* - seagull (42-43 Thousand Needles)
Emperor Tern* - seagull (87 Valley of Four Winds)
Gilded Tern* - seagull (87 Valley of Four Winds)
Shrimp Stuffed Seagull* - seagull (90 Dread Wastes, only when mantis shrimp are swarming)
Dark-Eye Raven* - raven (90 Isle of Thunder, Conquerer’s Terrace)
3. Carrion Bird: (slightly larger than minipet)
Upland Raven* - raven (87 Kun-Lai Summit)
4. Beetle: (about half the size of a regular beetle, has black streaks behind it when it moves)
Corpse Scarab* - black (80 spawned at Anub'rekhan in Naxxramas)
5. Wasp: (maybe twice as large as a minipet, quite small, at least)
Krasari Hissing Wasp* – blue wasp (86 – Krasarang Wilds)
Krasari Hissing Waspling* – blue wasp (86 – Krasarang Wilds)
Sapfly* – green firefly (89 – Dread Wastes)
Zijin Hollowfly* – purple firefly (87 – Valley of the Four Winds)
Waste Scavenger* – yellow firefly (89 – Dread Wastes)
6. Turtle: (half the size of their "normal" counterparts)
Rankbite Ancient* – spiked dragon "camo" (88 – Townlong Steppes)
Mature Terrapin* – brown dragon (90 Krasarang Wilds, Domination Point after the phasing point where the pipes and oil stuff show up)
Seadragon Hatchling* – brown dragon (85 Krasarang Wilds, Turtle Beach)
Great Turtle Hatchling* - brown dragon (90 Timeless Isle)
Larger than usual
7. Wasp: (VERY large)
Cyn* – blue and red boss (rare 41 – Thousand Needles)
Cida – green and red boss (rare 45 – Felwood)
Florawing Hive Queen* – purple boss (86 – Zul’Gurub)
Exotic – Need to be Beast Mastery and level 69 or higher
8. Worm: (slightly larger than other caterpillars)
Chibee* – yellow silkworm (85 elite – Fox Grove, Jade forest – phases out after completing Jade Jorest, but can tame by waiting on the river bank just behind where it becomes Fox Grove)
Note: This is what I found from Petopia, Wowhead and personal experience. I tested all of them but the wasp Cida, because she wasn't up. There are probably more out there. Post 'em if ya got 'em!