I know that myotis bats are not thease large bats but this page has not been updated for a while. Large myotis bats are used in the new rouge armour questin North qeynos. The only problem is that thay dont drop Large myotis bat furs. This problem has ben sent in as a bug but more people need to complane about it so that maby thay will do somthing about it.
Giant Bats are missing from the Bestiary in Qeynos Hills. One conned yellow to my level five ranger so there are also Giant Bats in Qeynos Hill at least level 6.
Yes, I would concur with the additional level for these at least in Misty Thicket, I had a few con yellow to me at 4, (not many, but a few, and YES they were the "Large" bats, not the "Giant" bats. Loot is regular bat stuff, bat fur and bat wings. If I could snare and flame lick the yellows, they went down without too much difficulty, and if I didn't, well, those good ol deputies were close at hand.