Volume 48, Number 4, 2017 BIRDS OF MIDDLETON ISLAND, A UNIQUE LANDFALL FOR MIGRANTS IN THE GULF OF ALASKA† LUCAS H. DECICCO, U.S. Fish and Wildlife Service, Migratory Bird Management, 1011 East Tudor Rd., Anchorage, Alaska 99503;
[email protected] DANIEL D. GIBSON, University of Alaska Museum, Fairbanks, Alaska 99775-6960 THEODORE G. TOBISH, JR., 2510 Foraker Drive, Anchorage, Alaska 99517 STEVEN C. HEINL, P.O. Box 23101, Ketchikan, Alaska 99901 NICHOLAS R. HAJDUKOVICH, JAMES A. JOHNSON, and CHARLES W. WRIGHT, U.S. Fish and Wildlife Service, Migratory Bird Management, 1011 East Tudor Rd., Anchorage, Alaska 99503 ABSTRACT: Migration studies at Middleton Island, Gulf of Alaska, over four decades (1974–2016) documented the regular autumn occurrences of over 100 species of birds (35+ passerines and 65+ nonpasserines), most of them apparently departing across the Gulf of Alaska for the Pacific coast to the east and south. With a focus on fall migration, we discuss here 261 species and 16 additional subspecies recorded at Middleton. We present much new information on the status of bird spe- cies and subspecies in the Gulf of Alaska and highlight the regular and predictable use of a route of migration across the Gulf of Alaska by large numbers of passerines, including species associated with the Central Flyway. Isolated in the northern Gulf of Alaska, Middleton Island (59° 26′ N, 146° 20′ W) lies 115 km from the Alaska mainland, 75 km from the nearest island (Montague Island, Prince William Sound), and 19 km from the edge of the continental shelf to the southeast (Figure 1).