Facts about Brewer's Sparrow
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The Brewer's Sparrow is named after ornithologist Thomas Mayo Brewer, a 19th-century Boston naturalist who contributed extensively to North American bird taxonomy.
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Brewer's Sparrow nests consist of small cup structures woven from grass and plant down, typically positioned low in sagebrush within 3 feet of the ground to conceal eggs from predators.
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Territorial Brewer's Sparrows have been observed responding to playback of conspecific songs within 20 seconds, demonstrating rapid acoustic communication in sagebrush ecosystems.
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During fall migration, Brewer's Sparrows rely on their ability to survive on seeds from desert shrubs for up to 20 hours without water in arid transitional zones.
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Breeding populations of Brewer's Sparrows have declined by approximately 1.5 percent annually since 1966 due to sagebrush habitat loss and degradation across western rangelands.
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Brewer's Sparrows migrate between 1,500 and 2,000 miles annually from their sagebrush breeding grounds in the Great Basin to wintering territories in northwestern Mexico and the southwestern United States.
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Male Brewer's Sparrows perform dawn chorus songs lasting up to 10 minutes during breeding season to establish and defend territories across sagebrush landscapes.
- 01
Across sagebrush habitats in western North America, Brewer's Sparrows typically weigh between 11 and 16 grams, making them among the smallest sparrow species in their range.