Emu

The emu is a large, flightless bird with shaggy grey-brown plumage, long neck and legs, and can reach heights up to 6.2 feet. Their specialized feathers function more like mammalian hair to protect against solar radiation and regulate body temperature in harsh climates.

Dark grayish-brown to black coloration with lighter grey tones near the base, uniform and melanin-pigmented without complex banding patterns

Plumulaceous with long, separate barbs that do not interlock, lacking functional hooklets; features a prominent secondary shaft (aftershaft) of almost equal size to the main rachis

Soft, hair-like, and flexible with a matte finish, lacking any waterproof oil coating or rigid interlocking vanes

Distinctive double-shafted structure where two rachises emerge from a single quill, completely un-interlocked hair-like barbs, and dark greyish-brown coloration

Open plains, eucalyptus woodlands, and savannah grasslands, avoiding dense tropical rainforests and hyper-arid deserts

Endemic to mainland Australia, introduced to Maria Island off Tasmania; widely farmed globally

Acts as an important seed disperser across Australian ecosystems by consuming large fruits and passing seeds intact over long distances

Other ratites such as ostriches or cassowaries, though ostrich feathers have broader, plumed white or black structures, and cassowary feathers are even stiffer and glossier black

Emus have two distinct shafts on every body feather of equal length, effectively doubling their insulation; they can run at speeds up to 30 mph and cannot walk backwards

Good condition, clean with intact dual shafts and no notable parasitic damage or severe fading