Very young Australian Cockroach nymph getting between the outer bracts of the unopened flower head. Ants do the same thing so there must be some food down there, although I don't know why there would be.
Lots on a Cherry Ballart (Exocarpos cupressiformis). I notice there are a few pics on the internet of this species on Exocarpos species. They are adept at hiding, by moving to the other side of the twig/branch they are on.