May 24, 2019May 23, 2019sweden fishing and birding Black grouse (Tetrao tetrix) in courtship mode. This male Black grouse has been putting on a terrific display for us this week. Here are some photos we took. Black grouse (Tetrao tetrix) in courtship mode. Photo by sweden fishing and birding. Male Black grouse (Tetrao tetrix). Photo by sweden fishing and birding. Share this:TwitterFacebookLike this:Like Loading...