Adult. Photo: Georgia Shawn Taylor/Flickr (CC BY-2.0)
Spizella pusilla
| Conservation status | Population probably increased with clearing of forest following European settlement of North America. Today widespread and abundant, although surveys show overall decline in recent decades. |
|---|---|
| Family | New World Sparrows |
| Habitat | Bushy pastures, brush, scrub. Found at all seasons in brushy overgrown fields, second growth, woodland edges, hedgerows in open country. Sometimes around brushy edges of marshes. Does not usually live in wide-open grassy fields unless they contain scattered shrubs. |
Forages on ground or in low vegetation. When feeding on grass seeds, will fly up to perch on grass stems, bending them to ground.
3-5, rarely 2-6. Whitish to pale bluish white, with brownish spots often concentrated at larger end. Incubation is by female only, 10-12 days, rarely up to 17 days in cold spring. Nests parasitized by Brown-headed Cowbirds are often deserted. Young: Both parents feed young. Female may begin a 2nd nesting attempt, leaving male to finish rearing 1st brood. If disturbed, young may leave nest as early as 5 days after hatching, more typically 7-8 days. Remain in low vegetation near nest site for several days; able to fly at age 13-14 days. Parents continue to feed them for about another 2 weeks. If nesting interrupted by predators or other disturbance, pairs quickly attempt to renest; one persistent female in Illinois made 10 nesting attempts in 1 season. If nesting successful, 2 broods per season, sometimes 3.
Both parents feed young. Female may begin a 2nd nesting attempt, leaving male to finish rearing 1st brood. If disturbed, young may leave nest as early as 5 days after hatching, more typically 7-8 days. Remain in low vegetation near nest site for several days; able to fly at age 13-14 days. Parents continue to feed them for about another 2 weeks. If nesting interrupted by predators or other disturbance, pairs quickly attempt to renest; one persistent female in Illinois made 10 nesting attempts in 1 season. If nesting successful, 2 broods per season, sometimes 3.
Seeds and insects. Diet is more than 90% seeds in winter, mainly small seeds of grasses. Also eat many grass seeds in summer, but insects make up more than 50% of summer diet. Nestlings are fed spiders and insects, especially caterpillars, with many grasshoppers fed to larger young.
Male defends nesting territory by singing persistently. Adults with young may put on "broken-wing" act at approach of danger. Nest site on or near the ground in clumps of grass, or in dense low bushes or saplings. Early nests generally on or near ground, later nests often higher. Nest is open cup woven of grasses, lined with finer plant material and hair. Female builds nest, although male may bring nest material.
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