Range breeding ... MacGillivray's warblers are very similar to their eastern counterpart, the mourning warbler, the primary difference between the two species being the mourning warbler's lack of an eye-ring. Two similarly hooded warblers occur east of the Rockies, the Connecticut Warbler (Oporornis agilis) and the Mourning Warbler (Oporornis philadelphia). They are heavy bodied with short tails. The MacGillivray's Warbler has a large range, estimated globally at 2,600,000 square kilometers. In Washington, the Breeding Bird Survey has reported a significant, statewide decline in population since 1966. Range: This species is found in the western United States and western Canada. MacGillivray's warblers are migratory and spend their summers in temperate forests in the western United States, and in boreal forests of west Canada. MacGillivray's Warblers are common within their range, but have experienced recent declines. Description: Height measures about 13 cm. In winter, they migrate south to Central America. Habitat characteristics include dense undergrowth of shrubs and moderate cover (Morrison and Meslow 1983). Predicted breeding range Learn how the map was created. Inhabits coniferous forest clearcuts with spruce and Douglas-fir or mixed deciduous forests with birch, aspen and poplar during the breeding season. An estimated 8% of the species' North American breeding range lies within the Boreal Forest. MacGillivray’s Warbler Seasonal Range Habitat. Native to the Americas, this bird prefers forest and shrubland ecosystems. Breeding Range: Breeding Range 2: Non Breeding Range: Geothlypis: tolmiei: Oporornis: tolmiei: NA: w, also n Mexico: MA: Oporornis: tolmiei: monticola: Oporornis: tolmiei: tolmiei : Physical charateristics. The global population of this bird is estimated at 5,400,000 individuals and does not show signs of decline that would necessitate inclusion on the IUCN Red List. The males have a black breast and head. Widespread logging in this area has created habitat appropriate for MacGillivray's Warblers, so the information is confusing. The females have grey heads and white eyerings. Vector datasets of CWHR range maps are one component of California Wildlife Habitat Relationships (CWHR), a comprehensive information system and predictive model for Californias wildlife. MacGillivray's is a common western warbler. The CWHR System was developed to support habitat conservation and management, land use planning, impact assessment, education, and research involving terrestrial vertebrates in California. = Core Habitat Breeding Range Map The green area shows predicted habitats for breeding only. Listen: Overview . Title MacGillivray's Warbler Range - CWHR B460 [ds1634] Publication date 2016-02-0100:00:00 Presentation formats digital map FGDC geospatial presentation format vector digital data Other citation details These are the same layers as appear in the CWHR System software. Male: Olive above, yellow below, with a slate gray hood (blackish on the throat) completely encircling the head and neck. The body is olive green on their upper body and yellow below. Partial white eye-ring is broken fore i and aft.
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