Emu Feathers

The feathers on the emu are unique in the fact that there are two feathers to a single quill.

 Picture from Carolina Emu

Feathers on an emu range greatly in size and texture.   The smallest emu feather may only be an inch long and very soft while the longest feathers are 18 inches or more and feel like straw.    However, they all have the double plume, or two feathers coming out of one shaft.

A Porcupines Defense Against It's Own Pricks

Porcupines are the only animal in North America with antibiotics in their skin.

Picture from Animals Town

On the occasion that a porcupine manages to stick itself with one of it's own quills, the antibiotic in it's skin will prevent infection.  Typically the quills lay flat until a porcupine is threatened, then leap to attention to act as a line of defense.