Brown-Capped Rosy-Finch

leucosticte australis

The Brown-Capped Rosy-Finch (Leucosticte australis) is a hardy passerine bird known for its remarkable adaptation to extreme alpine environments. This species is native to the high peaks of the southern Rocky Mountains, where it thrives in harsh, cold conditions year-round, often foraging around permanent snowfields and glaciers. These social birds are a delight to spot for their striking plumage and their ability to withstand altitudes where few other avian species venture. They are truly emblematic of North American high-altitude wildlife, representing resilience and specialized ecological niches.

生息地: Typically found in rugged, barren alpine tundra and subalpine zones, often foraging on rocky slopes, cliffs, and around permanent snowfields or glaciers above the tree line.

外見

This medium-sized finch features a distinctive brown crown and nape that contrast with a gray face and throat. Its body plumage is primarily brownish, with a beautiful rosy-pink wash on the belly, flanks, and wing-linings, which becomes more vibrant in breeding males. The back is streaked with black, and it has a relatively short, conical bill suited for seed eating. Its tail is moderately long and slightly forked, and it sports dark legs and feet.

界Animalia門Chordata綱Aves目Passeriformes科Fringillidae属Leucosticte

Brown-Capped Rosy-Finch

カテゴリ

鳥類

レア度

Common

危険度

1/5 · 非常に低い

スナップ

最初にスナップしよう！

おもしろい事実

Brown-Capped Rosy-Finches are part of a 'superspecies' complex with the Gray-Crowned and Black Rosy-Finches, all adapted to similar cold, high-altitude environments.

The Brown-Capped Rosy-Finch is considered one of North America's highest-dwelling birds, nesting and foraging at elevations exceeding 3,700 meters (12,000 feet) and sometimes much higher.

These birds are incredibly social outside of the breeding season, forming large flocks of hundreds or even thousands of individuals that move together across the winter landscape.

Unlike most migratory birds, rosy-finches often move to lower elevations during winter rather than south, making them 'altitudinal migrants'.

特殊能力

Brown-Capped Rosy-Finches possess physiological adaptations, including dense plumage and a high metabolic rate, allowing them to survive and forage in temperatures well below freezing, even during harsh alpine winters.

These finches are adept at foraging for insects that become trapped or frozen on snowfields and glaciers, providing a unique food source in an otherwise barren environment, especially during summer months.

They are among the highest-nesting birds in North America, constructing their nests in crevices and under ledges on cliffs in exposed alpine terrain, far above the timberline.

サイズと詳細

長さ: 14-16 cm
翼開長: 28-30 cm
体重: 0.02-0.03 kg
寿命: 3-5 年
Top Speed: 55 km/h
一度の産卵数: 4-6
抱卵期間: 12-14 日

食性と食事

The Brown-Capped Rosy-Finch primarily consumes seeds and insects, with its diet varying seasonally based on availability. Seeds form a significant part of their winter diet, while insects are crucial during the breeding season.

主な食物

Alpine plant seeds
Weed seeds
Beetles
Flies
Spiders
Caterpillars

採餌方法

Foraging

生態系とのつながり

eaten by

Prairie Falcon

Falco mexicanus

A primary predator that preys on finches in high-alpine environments.

eats

Alpine Avens

Geum rossii

Consumes various seeds from alpine plants, acting as a seed disperser.

eats

High-altitude Fly

various Diptera species

Forages on insects, including flies, that are found in alpine habitats.

competitor

Gray-Crowned Rosy-Finch

Leucosticte tephrocotis

Competes for food resources and nesting sites, especially when ranges overlap.

特徴

このオブジェクトにはまだ特徴バッジが割り当てられていません。

別名

まだ別名はありません。

コレクション

テーマが追加されると、このオブジェクトのコレクションがここに表示されます。

安全性

危険度

1/5 · 非常に低い

まだ特別な安全上の注意はありません。

よくある質問

Brown-Capped Rosy-Finchを見分けるには？

Brown-Capped Rosy-Finchを識別する最も簡単な方法は、Snappit自然識別アプリを使用することです。

Brown-Capped Rosy-Finchの長さは何ですか？

14-16 cm

Brown-Capped Rosy-Finchの翼開長は何ですか？

28-30 cm

Brown-Capped Rosy-Finchの体重は何ですか？

0.02-0.03 kg

Brown-Capped Rosy-Finchの寿命は何ですか？

3-5 年

Brown-Capped Rosy-Finchのtop Speedは何ですか？

55 km/h

Brown-Capped Rosy-Finchは何を食べますか？

Brown-Capped Rosy-Finchは通常どこに生息していますか？

Typically found in rugged, barren alpine tundra and subalpine zones, often foraging on rocky slopes, cliffs, and around permanent snowfields or glaciers above the tree line.