In March, as I walked down the Pine Lake Loop path I began to see spring activity increasing at Turnbull. On Winslow pool, I saw a pair of Trumpeter Swans dipping their long necks into the water to consume the aquatic plants, roots and tubers. They do not have teeth but they possess hard, plastic-like serrated ridges along the edges of their beaks called lamellae, which function like teeth to grip vegetation, filter food and tear aquatic plants. They also have jagged structures on their tongues called "barbs" or conical papillae made of cartilage (similar to the rough tongues of cats!).