There are at least two ways to make a gargoyle: Carve it or sculpt it.
I carved this one out of poplar wood for the end of the handrail in the stairway to my studio. Poplar splits easily and I messed up on the other side---which is why I put the bad side to the wall.
But there’s an easier way if the piece is only decorative. You can sculpt the head out of the air-drying foam called “Model Magic,” and then paint it with acrylic to simulate wood grain. The whole process only takes a couple of hours.
That’s how Jeanette and I did the green men that live on the keystones of the arches over the studio windows.