This section is from the book "Bird Guide: Water Birds, Game Birds And Birds Of Prey East Of The Rockies", by Chester A. Reed. Also available from Amazon: The Bird Book.
700. Anthus spraguei. 6 1/4 inches. Upper parts streaked with buff and blackish; below pale buffy with black markings. These birds are found on the Plains from the Dakotas to Hudson Bay in summer, migrating to Mexico in winter. They resemble the European Skylark in their habit of soaring to a great height while singing. Their song is very melodious, resembling that of the Bobolink. Their nests are depressions in the ground, lined with grasses. Eggs grayish, finely specked with purplish gray (.87 x .67).
 
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