British birds (2003)

British birds (2004)

British birds (2005)

British birds (2007)

British birds (2008)

British birds (2009)

British birds (2010)

British birds (2011)

British birds (2012)

British birds (2013)

British birds (2014)

British birds (2015)

British birds (2016)

British birds (1994)

Bulletin - Essex County Ornithological Club of Massachusetts. (1920)

Bulletin - New York State Museum. (University of the State of New York, 1951)

Bulletin - Colorado Agricultural Experiment Station (Colorado State University Experiment Station, 1897)

Bulletin - Colorado Agricultural Experiment Station (Colorado State University Experiment Station, 1898)

Bulletin - Essex County Ornithological Club of Massachusetts. (1931)

Bulletin - Essex County Ornithological Club of Massachusetts. (1934)

Bulletin - National Museum of Canada. (National Museum of Canada, 1926)

Bulletin - National Museum of Canada. (National Museum of Canada, 1929)

Bulletin - National Museum of Canada. (National Museum of Canada, 1934)

Bulletin - United States National Museum (G.P.O, 1953)

Bulletin - United States National Museum (G.P.O, 1960)

Bulletin - United States National Museum (G.P.O, 1961)

Bulletin - United States National Museum (G.P.O, 1963)

Bulletin - United States National Museum (G.P.O, 1968)