“The author takes a {{w|Joseph Grinnell#Grinnell Method of note taking|Grinnell}}ian approach to identifying the major environmental factors that help define the species-specific niches of {{w|taiga}} birds in Alaska. In her study, she censused breeding birds on twelve 10-{{w|Hectare|ha}} plots selected to represent fairly homogeneous tracts of each of the major {{w|habitat}}s described for Alaska's taiga.”