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Northern Prairie Wildlife Research Center

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Forest and Rangeland Birds of the United States

Natural History and Habitat Use

Mourning Warbler -- Oporornis philadelphia

RANGE: Breeds east of the Rocky Mountains across Canada and the northern United States from northeastern British Columbia to Newfoundland south to North Dakota and central New England through the Appalachian Mountains to Virginia. Winters in Central America and northwestern South America.

STATUS: Locally common to uncommon.

HABITAT: Inhabits shrubby second-growth, dense undergrowth in open woods, shrubby margins of lowland swamps or bogs, and forest clearings or burned areas that have brambles, shrubs, and saplings. May occur in partially open coniferous and deciduous woodlands with herb and shrub understories.

SPECIAL HABITAT REQUIREMENTS: Extensive stands of saplings or dense shrubs.

NEST: Conceals nests in dense herbaceous or shrubby vegetation on or near the ground. Tends to nest in edges along woodland or clearing edges, logging trails, or at the edges of bogs and marshes.

FOOD: Generally gleans beetles, lepidopterans, and spiders from the ground or low shrubs. (Detailed food habits have not been studied.)

REFERENCES: Cox 1960, DeGraff et al. 1980, DeSante in Farrand 1983c, Griscom and Sprunt 1979.

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