Is that a Brazilian turtle? Why the yellow face?

Judging from your photo, this is a Brazilian tortoise. Yes, most Brazilian tortoises have red ears, and some don't.

The Brazilian tortoise is of medium build, with a small head, blunt nose and mouth, yellow and green vertical stripes on its head and neck, and a pair of red patches behind its eyes. The shell is flat, and each shield has a round green pattern, and the rear edge is not serrated.

The carapace is light yellow, with black ring lines, like copper coins, and the carapace and carapace are connected by bone seams.