by Mack, Glenn G, Clark, Robert G
Published in The Auk (01.04.2006)

by Mack, Glenn G, Clark, Robert G, Howerter, David W
Published in Canadian journal of zoology (01.08.2003)

by Stuart M. Slattery, Julienne L. Morissette, Glenn G. Mack, Eric W. Butterworth
Published in Boreal Birds of North America (16.10.2011)

by Mack, Glenn G., Clark, Robert G.
Published in The Auk (01.04.2006)

by Slattery, Stuart M, Morissette, Julienne L, Mack, Glenn G, Butterworth, Eric W
Published in Boreal Birds of North America (2019)