Nature #73 Rien Poortvliet (1932-1995)

The picture has something of this: mammal, animal, cavalry, wildlife, nature, mane, grass, wild, portrait, outdoors, park, fall, mare, hair, grassland, two, tree, head.
Perhaps it’s a painting of two brown horses standing next to each other in a wooded area with trees and grass on either side of the horse’s head.