WATERMARK

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Prairie Dogs Have Own Language:

Prairie dogs, those little pups popping in and out of holes on vacant
lots and rural rangeland, are talking up a storm. They have different
"words" for tall human in yellow shirt, short human in green shirt,
coyote, deer, red-tailed hawk and many other creatures.

They can
even coin new terms for things they’ve never seen before, independently
coming up with the same calls or words, according to Con Slobodchikoff,
a Northern Arizona University biology professor and prairie dog
linguist. . .
From  RedNova News; brought to my attention by Dru Blood

Panda handstand makes its mark:

. . . Pandas can adopt four distinct postures to deposit scent, with probably the strangest being the handstand.  The bear goes upside down on its front paws with the aim of pushing its urine as high up a tree trunk as possible. . .
From  BBC News — go to the site to see the video

So other animals have their own languages; and, if one can imagine urine as ink, their own written languages.  Some panda bear thought of this one day — probably a short panda bear.