Answer:
I am flora not fauna. I am foliage not trees. I am shrubbery not grass.
I am the only word that looks the same when spelled upside down.
I sit in a corner while travelling around the world.
I have numbers on my face but can't find 13 any place. What am I?
I am a sound made by felines when petted.
No matter how little or how much you use me, you change me every month.