Hans Emmenegger, Public domain, via Wikimedia Commons.

English: Black Grouse in Gliding Flight (painting by Hans Emmenegger, 1933)

Deutsch: Spielhahn im Gleitflug (Gemälde von Hans Emmenegger, um 1915)

Hans Emmenegger (1866 - 1940) was a Swiss artist known for his still lifes and pleinairist landscapes rendered with bold chiaroscuro contrasts.

references:

1: http://www.sikart.ch/werke.aspx?id=9941325

2: https://www.collection.pictet/index.php/artist/emmenegger