Seaside Sparrow
Ammospiza maritima
The darkest sparrow found exclusively in wet saltmarshes with tall grass. Shares habitat with Saltmarsh and Nelson's Sparrows but Seaside is plainer and grayer overall. Plumage differs slightly among populations: Gulf Coast birds brighter, southern Florida birds show more distinct streaking below, Atlantic birds dullest. All populations have a contrasting white throat, yellow in front of eye, and a long bill. Perches conspicuously when singing, otherwise secretive, especially in winter. Rougher, buzzier song than Nelson's or Saltmarsh Sparrows: a few harsh introductory notes followed by a raspy sigh.
识别特征
Adults have brownish upperparts with gray on the crown and nape, and a grayish-buff-colored breast with dark streaks; they have a dark face with gray cheeks, a white throat, and a short, pointed tail. Birds show a small yellow streak just above the eye. A typical seaside sparrow lifespan in 8 to 9 years of maximum. The oldest record of seaside sparrow was an individual male which was at least 10 years old when recaptured and re-released during the banding operations in South Carolina.
分类信息
- 学名
- Ammospiza maritima
- 命名信息
- (Wilson, A, 1811)
- 目
- Passeriformes
- 科
- Passerellidae
- 属
- Ammospiza
分布与栖息地
Their breeding habitat is salt marshes on the Atlantic and Gulf coasts of the United States from southern New Hampshire to southern Texas. The nest is an open cup usually built in the salt marsh on tidal reeds and spartina grasses. Females lay two to five eggs.
- 迁徙
- Resident species
保护状况
One of the numerous subspecies of this bird, the dusky seaside sparrow (A. m. nigrescens), has recently become extinct, and the Cape Sable subspecies, A. m. mirabilis, is endangered. Occurring in a restricted range but of uncertain validity is Scott's seaside sparrow, (A. m. peninsulae). The small isolated population that near Corpus Christi, Texas, south to the Rio Grande and sennetti subspecies may also have risk to endangered, those were formerly considered a separate species.
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Chestnut-crowned Becard
Pachyramphus castaneus
Medium-sized becard found at the edges of humid forests, woodlands, and gallery forests where it tends to perches on exposed branches. It has a chestnut crown contrasting with a broad gray band around the eyes and a cinnamon face and underparts. Sexes similar. The song is a soft musical whistled “teeuw-teeu-teeu.”
Glow-throated Hummingbird
Selasphorus ardens
Tiny, poorly-known hummingbird with extremely limited range in western Panama. Males are greenish above with rusty flanks, a pinkish-red throat, and a white collar. Note dark tail with rufous edging. Compare with male Scintillant Hummingbird, which has a mostly rufous tail and an orange throat. Female Glow-throated has a speckled throat, buffy flanks, and greenish upperparts. The central tail feathers are greenish while the rest of tail is rufous with a black band and buffy tips. Female Scintillant is very similar and may not be separable in the field, but has more extensive rufous edges on central tail feathers. Found at the edge of montane forest from around 750–1,800 m.
White-breasted Nuthatch
Sitta carolinensis
The largest nuthatch in North America, with distinctive white face, black cap, and blue-gray upperparts. Also note rusty lower belly and undertail coverts. Females have a slightly paler crown than males. Fairly common and widespread, usually in mature woodlands with large trees. Creeps along tree trunks and branches, often upside-down. Sometimes joins mixed flocks with other songbirds. Visits feeders. Listen for insistent yammering calls. Some subtle variation across range, mainly in the darkness of the sides and back, width of the black crown, and vocalizations.
开始您的观鸟之旅
在户外识别鸟类，并在下一次观察时随手查阅鸟类图鉴。