|Cinereous Harrier Circus cinereus, Los Glaciares NP, Argentina.|
|Basic parts of feather (of Australian Bustard - found dead by the road!).|
|Flight feather (of Australian Pelican) - very stiff and strong.|
|The extensive downy base is evident; down feather barbs have no barbules, so are loose and woolly.|
|Natal down on Swallow-tailed Gull Creagrus furcatus chick, Galápagos (above),|
and on Darwin's Rhea Rhea pennata chicks, Torres del Paine NP, Chile (below).
|These chicks are still substantially covered in natal down, but are also developing flight feathers.|
Red-tailed Tropicbird Phaethon rubricauda, Lady Elliott Island, Queensland, above;
Australian Darters Anhinga novaehollandiae, Canberra, below.
|Emu feather with aftershaft.|
The barbs have no barbules, hence the characteristic 'haystack' appearance of emus, and the
hairy look of cassowaries.
|Tawny Frogmouth Podargus strigoides (on nest), Canberra|
|Paperbark Flycatcher Myiagra nana, Nitmiluk NP, Northern Territory.|
|Mealy Parrots Amazona farinosa at Blanquillo Clay Lick, Peruvian Amazonia.|
The floury (ie 'mealy') appearance is due to an abundance of powder down.
|White-necked Heron Ardea pacifica, Grenfell, New South Wales.|
All herons have powder down which they collect with the bill and pass to the foot to apply to the feathers.
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