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Ideal grazing intensities and fire frequencies vary across their range depending on climate, but areas with moderate grazing by cattle or bison, prescribed burning every 2–3 years, and removal of woody plants tend to support the highest densities of grasshopper sparrows in the Southern great plains.
Their breeding habitat is shrubby fields, often wet, in southern Canada, the northeastern United States, [6] and the midwestern United States. [7] In 2020, the Central Kentucky Audubon Society discovered that a population of Henslow's sparrows near a winery only needed 5 acres of grassy habitat to successfully breed (previous research had suggested at least 20 to 75 acres were necessary).
The size and color of its crown patches help to determine a bird's status among its flock mates. Measuring 15–18 cm (6–7 in) in length [9] with a wingspan of 24.75 cm (9.74 in) [10] and ranging from 19.0 to 35.4 g (0.67 to 1.25 oz) in mass, [3] the adult golden-crowned sparrow is fairly large for an American sparrow. [9]
National Geographic, with Alderfer, Paul Hess, and Noah Strycker, also published National Geographic Backyard Guide to the Birds of North America in 2011. A second edition was released in 2019. Like the pocket guide, this guide is 256 pages and outlines the 150 most common yard birds in North America.
PFG 1: A Field Guide to the Birds (1934), by Roger Tory Peterson . Second edition (1939): A Field Guide to the Birds Third edition (1947): A Field Guide to the Birds Fourth edition (1980): A Field Guide to the Birds: A Completely New Guide to All the Birds of Eastern and Central North America
The field sparrow is distributed across eastern Canada and the eastern United States, with northern populations migrating southwards to southern United States and north-eastern Mexico in the fall. [2] The typical habitat of this bird is bushy country with shrubs and grassland.
Unlike some other sparrows in the regions they are found, vesper sparrows are located in lower elevations of grassy areas such as dry grasslands, sagebrush and fields. Around September, with the onset of fall, vesper sparrows migrate to the eastern United States, the central United States, Mexico and the Gulf Coast.
Flowering big bluestem, a characteristic tallgrass prairie plant. The tallgrass prairie is an ecosystem native to central North America.Historically, natural and anthropogenic fire, as well as grazing by large mammals (primarily bison) provided periodic disturbances to these ecosystems, limiting the encroachment of trees, recycling soil nutrients, and facilitating seed dispersal and germination.