Complex sentence: The Sharp-tailed Grouse ("Tympanuchus phasianellus") is a medium-sized prairie grouse similar in size to the Greater Prairie-Chicken, males weigh an average of 33.5 oz. (951 g) and females average 29 oz. (815 g).
Split into simpler sentences: The Sharp-tailed Grouse, "Tympanuchus phasianellus", is a medium-sized prairie grouse. Males weigh an average of 33.5 oz. (951 g) and females average 29 oz. (815 g).