The eggs are usually incubated by the female for 11 to 13 days. This sparrow is an early nester, beginning egg laying in late April to early May, however; later nesting attempts in agricultural fields may result in nest … This photograph is labeled Nest of Vesper Sparrow. Close ) depredated nests. They often form small colonies, with three to six pairs nesting in an area. . Status in Tennessee: The Vesper's Sparrow is a locally uncommon summer resident in East Tennessee, and a regular but uncommon migrant and rare winter resident elsewhere in the state. The vesper sparrow is an early spring migrant with males arriving in New York in late March and females arriving within a week of the males. Nest: A shallow cup of woven grasses, placed on the ground, concealed by adjacent vegetation. Oregon vesper sparrow sensitivity is largely driven by their dependence on open habitats, seeds, and insects. Of those birds building on the ground, Gene says,"The architecture of about one-half the birds that build on the ground is a disgrace to decent bird carpentry. (1991). Appearing in the July issue of "Outing magazine" on page 440, it bears the caption, Ground Sparrow's nest. Because of the necessity of open ground for nesting, the vesper sparrow will often nest in agricultural fields. The 3 to 5 eggs are smooth, slightly glossy and white, marked with brown. Predators and avian community organization: an experiment in a semi-desert grassland. Close ). Vesper Sparrow remains identified in pellets from Prairie Falcon (Falco mexicanus) perches (Lima and Valone 1991 Lima, S. L. and T. J. Valone. . The nest is a small depression made by the sparrow, lined with fine materials, and located near sparse patches of vegetation. Vesper sparrows exhibit site fidelity, as pairs return to the same nesting location during consecutive years. Nests are constructed on the ground often under or at the base of vegetation. It is woven out of grasses and lined with fine grasses, feathers, and hair. The nest is built by the female alone. Reproduction: The vesper sparrow nests on the ground in dry, grassy areas. Over a one- to two-week period, the female vesper sparrow constructs a cup nest of grasses, and lines it with thinner grasses. Oecologia 86:105-112.
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