A favorite street artist of mine, partially because I walk by his work on a regular basis. You can see his stuff all over the East Village, Brooklyn, other parts of NYC and the world.
The rat and the bird are at 2nd and 2nd, aka Bond St. The bird is in Albert's Garden on the east wall, and the rat is on a staircase nearby. There is also a squirrel in Williamsburg at Berry and N 5th. I'll let you know if I find more.