Nature #84 Rien Poortvliet (1932-1995)

The picture has something of this: winter, outdoors, tree, snow, mammal, nature, water, landscape, fall, cold, wood, wildlife, river, park, dawn, reflection, grass, evening.
Perhaps it’s a painting of a herd of woolly mammoths walking through a swampy area with a flock of birds flying over the top of the water.