Here's a quick step-by-step on how to make a gargoyle out of plastic bottles , a couple of pieces of pvc pipe and paper.
First step is bending the PVC pipes into an armature shape , with two T-connectors for the wings.( second pic )
Second step is to tape plastic bottles to the pvc to form the body and legs.
Third step is papier mache-ing the whole gargoyle.
Step 4 is to make the wings out of pvc ( sorry no pics )
and mache those too.
Step 5 is to make a papier mache mix and add some fiber insulation to it to make it look like stone. ( See next pic )
You can get this insulation at any home improvement store.