Mystery colours Grey Whistler races

Bit of a mystery bird, the Grey Whistler (Pachycephala simplex). Two races, simplex, plainish and confined to Northern Territory, and peninsulae, with lemon underbelly and located in northeast Queensland.

But there's no hint of lemon in most Grey Whistlers around Ingham, such  as the above at Jourama Falls yesterday.

As to grey, it's easy to see why alternative name - little-used, though more appropriate - is Brown Whistler.

Elsewhere at Jourama, no mystery about White-browed Robin (Poecilodryas superciliosa), which, unlike Grey Whistler, seldom stays silent for very long.