rule 34 animal genitalia anus claws countershade torso countershading covering covering face digitigrade dragon erection feral genital slit genitals grass greyscale hi res horn knot lin fluffydragon long neck looking at viewer male membrane anatomy membranous wings monochrome partially submerged penis plant pupils scalie shaded shrub shy signature slit slit pupils solo spread legs spreading tail thick tail toe claws water waterfall wet wet body wing claws wings wyvern 9329062