Wood: Only talking about ruffed grouse. What concerns me is that the spring drumming counts are for the most part following the 10 year cycle that I have personally observed since 1984. However the last three years the actual number of grouse in the fall are far less than the spring drumming counts would indicate. Something is happening between May and October. Any "countless reference materials available to help one understand this"? Thanks. The two best reference books I have are "Grouse of the North Shore" by Gordon Gullion and "Ruffed Grouse" by Sally Atwater and Judith Schnell.
