Bat sitting on jack-o-lantern pumpkin ...   painted on 9-1/8"x18" tall grooved pumpkin or on your surface of choice.

Surface originally from ArtistsClub.com (now closed), but could easily be adapted to large pumpkin cutout from CDWood.com or BearWithUsInc.com

DecoArt Americana Acrylics.

Pattern includes photos, supply list, instructions, line drawing.  You will download the pdf file and print the pattern yourself.