The sickle tail is the single phenotypic characteristic that seems to separate dogs from wolves. Dogs who have tails tend to have an upward curve in the tail, which is called the sickle tail. Wolves' tails, on the other hand, hang straight; this is called the brush tail—similar to that of a fox.
Famous quotes containing the word tail:
“The tiger in the tiger-pit
Is not more irritable than I.
The whipping tail is not more still
Than when I smell the enemy
Writhing in the essential blood
Or dangling from the friendly tree.”
—T.S. (Thomas Stearns)