Jagat Satwa claim that they instead have the species pitohui dichrous, hooded pitohui. Though with the addition of the clear sexual dimorphim with the female and the more darker brown back and underpart of the male, there's higher chance that it could be the southern P. uropygialis species instead.
The nominate subspecies found in the Bird's Head Peninsula of New Guinea, as well as the offshore islands of Batanta and Misool.
@Fargusno with these type of situations, I wouldn't say that they're off-display until you're sure enough and find them hard enough or if you know someone to ask too. The pitohuis, two pairs of male and female, always hide in the big tree at the back of the gazebo where the bird interaction at, only came down for feeding so you got to be lucky.
Saying something is "off-display" just because you didn't saw it, could be very misleading, among other things.
@Rizz Carlton I'll need to stop assuming that they put them off display when in fact I didn't take my time to look for them. Also I'm surprised they let it free-roaming despite its venomous bite (or peck)
@Fargusno to be more precise, they're poisonous. Their body and wings are coated with batrachotoxin, which will cause numbness and tingling if touched. Though I don't think they're fatal, unless eaten of course.