I had 3 spawn at once in Misty Thicket today. All of them dropped Giant Fire Beetle Leg.
In Kithicor Forest: (no data)
In Al'Kabor's Nightmare: PHs are three of the six "a Klaknak guard" mobs on the Rivervale island (the other three are the Princess's PH). The Queen hits for a max ~12,000; spawns time-based adds two at a time, called "a Klaknak Drone" (mezzable; each hit for a max ~2,800). Note: For all map points of nameds in Al'Kabor's Nightmare (for "alkabormare.txt" map files), see this quest entry.