is this turkey tail mushroom?
The bracket fungus that you show appears to be very small, about 2 or 3 times your thumb. Turkey tail, or Trametes versicolor, has pores on the lower surface like this, but is usually characterized by zones of color of brown and yellow. Trametes pubescens is a smaller polypore with a cream-colored, finely velvety cap surface that lacks strongly contrasting zones of color (Trametes versicolor is decidedly zoned). Its pore surface becomes yellowish with age, and features 3-5 angular pores per mm. Trametes pubescens is a decomposer of the deadwood of hardwoods, widely distributed on hardwoods.
Without seeing a specimen, I cannot really tell for sure.