CHUBBY BUNNIES by Leony
This is a classic translational (slide) tessellation. You can tell it's a translational tessellation because the bunnies' heads are all at the same angle-- they're simply repeated along the X axis (left-right) and Y axis (up-down), without rotation.
Is this a tessellation? Well, if we look at the faces NOT as faces, but as abstract shapes, then yes, this is a tessellation. However, if we say the shape is a face, then we have to ask "Where's the bunny's body?" and "My goodness, those rabbits have only two feet, and noses like elephants!"
See this example from the "Is it a Tessellation?" section of Tessellations.org for a clearer explanation of why Leony's "Chubby Bunnies" make...and don't make...a tessellation.
So, which is your favorite rabbit head? Mine's the winking bunny in the top row, center.