At the north end of Cayuga Lake is a vast section of wetlands, rivers, and swamps that is now Montezuma National Wildlife Refuge.  This refuge has all sorts of habitats, but what most visitors come to see is the waterfowl.  In the spring there are tens of thousands of Snow Geese, Canada Geese and Tundra Swans.  With tens of thousands of ducks and geese this place really gets hopping.  The Main Pool and attached "Wildlife Drive" provides some of the best views of migrating ducks you could ever hope for.  Black Ducks, Wigeons, American Coots, and Common Moorhens are common as are Shovelers, Mallards and Blue-wing Teal.  All of New York's ducks can be seen here with occasional rarities.  Ross' Goose is annual.  Raptors abound with nesting Harriers, Osprey, and of course Bald Eagle.  There are actually several nesting pairs of eagle, but Tschache Pool usually provides the best viewing.  May's Point is managed in fall for shorebirds and they arrive by the hundreds.  Yellowlegs, Killdeer, Semipalmated Plover and Least Sandpiper are most common, but most of the expected species are present and rarities are found.  Black-bellied Plover and Short-billed Dowitcher are regular.  Montezuma is an Important Bird Area and is the center of a lot of ornithological and ecological research.  Plauged by a Purple Loosestrife problem recent introductions of a loosestrife-eating weevil and a beetle at the refuge are hoped to stop the spread of this weed.