Contrary to what some individuals believe, porcupines do not sleep soundly without interruption, while napping in trees.
They often change position, sometimes taking time to scratch to remove old fur, particularly in the Spring to remove an old winter coat (Photo #1 through Photo #3).
Having climbed the tree the night before and after a day of foraging the trees for Spring buds, ascending or descending to another area of the tree when branches became to hard to reach at the current level, it's time to return to napping but not before a yawn or two (Photo #4 and Photo #5).
PHOTO #1

PHOTO #2

PHOTO #3

PHOTO #4

PHOTO #5
