Zigmer's Comments

Found a group of 3 flying togeather in Vale of Eternal Blossoms, at 23.06, 60.47.

These Jungle Grubs are exclusively H/H and H/S.

From everything I've seen, most of these raids seem to drop an average 3 between the 40 people.. A bit more than the listed odds, Although, maybe some raids drop none, however, I've not seen this is the case.

After doing 1 round trip going Spawn to Spawn all around the whole of Northrend in a Loop, I went the following order, "Borean Tundra > Sholazar Basin > Icecrown > Zul'Drak > Grizzly Hills > Howling Fjord > Crystalsong > Dragonblight", The very last spawn location, Dragonblight, was where I found my Uncommon Unborn Val'kyr H/H.

Likely theres a more efficient route, but still it was fun. Doing it as a round trip was an adventure, and the end was rewarding! :)