Answer: A grotesque
Although the term "gargoyle" is commonly used for any type of statue-like ornament that traditionally adorns the corners and pinnacles of buildings. A gargoyle is a functional gem that diverts water away from a building ̵
Gargoyles were commonly called screaming creatures, demons, or animals, precisely because their open mouths were practical endpoints for the gutters that drain the water from the roof.
A statue that looks like a gargoyle but has only a decorative function is referred to as Grotesque – traditionally the same design as a gargoyle, but without the practical use of diverting water.