This squirrel, or one of his buddies, had placed sumac cones all over the place. There was one on the downed Manitoba maple over the pond, three in the Manitoba maple above the pond (in which he is sitting), and two in the walnut tree at the west end of the pond. Earlier, I had seen a red (maybe this one), running along the top edge of the pond with a sumac cone in his mouth. There isn't a lot of food available yet for animals, so squirrels such as this, are still relying on last year's sumac, any buried nuts they may find, stores of cones (if any are left), and seeds at the feeder. They do, however, have fresh tree sap and buds to eat.