Vintage Tribal Artwork on Tree Bark Fruit Bat

vintage artwork ~ ochre yellow and white paint on tree bark interesting painting on a concave piece of tree bark my research tells me this MAY be the depiction of a fruit bat, and it may originate in Australia by artist Mary Serico, but there are no markings or signatures that I can see I will say that this piece is not coated, and the wood is raw, unsanded, and kind of 'picky' on the hands measures approx 9" wide x 17.5" tall in good vintage condition ~ there is a very small amount of paint loss (pictured)