I'm always alone in the corner of the black/white surface, Although sometimes people come to me at the time of exit...

Question

I'm always alone in the corner of the (usually) black/white surface,
Although sometimes people come to me at the time of exit,
You have to cross 14 bridges for a vacation from me,
I'm half of my real name,
And another half known as animal.
not a fixed size figure,
You don't find me twice.