In this task, you're expected to write answers to questions involving multiple references to the same entity. The answer to the question should be unambiguous and a phrase in the paragraph. Most questions can have only one correct answer.

Passage: A tree comes down in a forest and several lumberjacks hack away at it with their axes. To the side, two lumberjacks, one a muscular man, the other one rather scrawny, chop at a tree, but only the larger man makes any progress. The skinny fellow prances off to a tiny sapling and with some effort chops it down, only to end up with pieces of it stuck to his head. The pieces resemble antlers. The lumber men have several inventive methods for chopping trees: one, involving a tractor-like vehicle with a large saw protruding from its side, leads to the felling of a guard tower in the forest!
The scene switches to Buddy, who, upon chopping a tree with his axe, sends such a shake upwards that a mother and father bird are forced to remove their nest and babies from the tree top and carry the nest elsewhere. Some time obviously passes, for in the next scene, Buddy has already succeeded in felling the trunk. Merrily whistling away, Our Hero next gently glides a lawnmower-like device across a fallen trunk, in the process creating many toothpicks, which he then dumps into a truck, yelling to the driver: "Take it away!" Using a saw as though it were a jump rope, Buddy cuts a standing tree into several smaller pieces.
Buddy so goads a goat that the creature chases him. The goat's horns cut through the suspended logs atop which Buddy runs from the pursuing creature. Eventually, the goat rams headfirst into a tree, and gets incapacitated. Buddy then carries an armful of small logs, but drops them, upon tripping, just perfectly that they are arranged across a wooden stand as a xylophone, which Buddy then plays by means of two axes: a totem pole comes to life and dances for the lumberjacks. The hard-working men are called to supper: enthusiastically, they wash up. A song before the meal: "I Open the Old Northwest", with Buddy at the piano. Cookie serves the men their spaghetti.
Question: Who has a nest with babies in the tree that is chopped with an axe?
mother and father bird.