What is the rhetoric of sticking out a small head with black spots on both cheeks from a tree hole?

Poke a small head with black spots on both cheeks out of a tree hole, which can be a figurative rhetorical device. This sentence uses metaphor to describe the creature that appears in the tree hole, and uses metaphor to describe it as a "small head" to highlight its cute and eye-catching characteristics. Black spots are used to set off its lovely and unique appearance. This rhetorical device makes the description more vivid and fascinating through metaphor and exaggeration.