American Tree Sparrow

spizelloides arborea

The American Tree Sparrow is a cheerful and hardy visitor to winter backyards across North America. Despite its name, this small sparrow actually spends most of its time foraging on the ground and nests on tundra shrubs rather than high in the canopy. Originally named by European settlers who noted its resemblance to the Eurasian Tree Sparrow, this bird is easily recognized by its bright rusty cap and a single dark spot in the center of its breast. In the summer, they migrate to the far north of Canada and Alaska, where they fill the open tundra with sweet, musical songs. During the winter, they travel south in cooperative flocks, bringing life to snowy fields and garden feeders alike.

生息地: Found in open shrubby tundra during the breeding season, and weedy fields, forest edges, and suburban backyards during the winter.

外見

A medium-sized sparrow measuring about 13 to 16 centimeters, the American Tree Sparrow is identified by its bright rufous-brown cap and a thin rufous line extending behind its eye. Its gray face contrasts with a clean, unstreaked gray-white breast, which is uniquely marked with a distinct dark spot right in the center. Its wings feature two distinct white bars on a background of warm brown and black streaks. Additionally, it has a prominent two-toned bill with a dark gray upper mandible and a bright yellow lower mandible.

界Animalia門Chordata綱Aves目Passeriformes科Passerellidae属Spizelloides

American Tree Sparrow

カテゴリ

鳥類

レア度

Common

危険度

1/5 · 非常に低い

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おもしろい事実

An individual American Tree Sparrow must consume about thirty percent of its body weight in food and water every day to survive cold winter temperatures.

Despite its name, the American Tree Sparrow actually nests on or near the ground, not in trees, as early European settlers mistook them for the European Tree Sparrow.

They form foraging flocks during the winter, often mixing with other species like Dark-eyed Juncos and Harris's Sparrows.

They have a distinctive bicolored bill: the upper half is dark grey or black, while the lower half is a bright yellow.

特殊能力

They can survive temperatures as low as minus twenty degrees Fahrenheit by continuously shivering to raise their metabolic rate.

They use a specialized double-scratch hop technique with both feet to clear snow and leaf litter, exposing hidden seeds.

They utilize a constant stream of high-pitched, soft notes while feeding to keep flock members coordinated and safe in dense brush.

サイズと詳細

長さ: 13-16 cm
翼開長: 20-24 cm
体重: 0.013-0.028 kg
寿命: 2-8 年
Top Speed: 35 km/h
一度の産卵数: 4-6
抱卵期間: 11-13 日
渡りの距離: 3000 km

食性と食事

During the winter, they rely almost exclusively on the seeds of grasses, weeds, and birch trees. In summer, they shift to a high-protein diet of insects and spiders to support breeding.

年齢による違い: Chicks are fed entirely on insects and other small invertebrates, whereas adults gradually transition to a seed-based diet as winter approaches.

主な食物

Grass seeds
Weed seeds
Caterpillars
Beetles
Berries

採餌方法

Foraging

生態系とのつながり

eaten by

Sharp-shinned Hawk

Accipiter striatus

Preys on wintering sparrows at garden feeders and forest edges.

competitor

Dark-eyed Junco

Junco hyemalis

Competes for fallen seeds and space at winter foraging sites and backyard feeders.

eaten by

Merlin

Falco columbarius

Preys on adult sparrows during their migration and in breeding territories.

特徴

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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

American Tree Sparrowを見分けるには？

American Tree Sparrow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。

American Tree Sparrowの長さは何ですか？

13-16 cm

American Tree Sparrowの翼開長は何ですか？

20-24 cm

American Tree Sparrowの体重は何ですか？

0.013-0.028 kg

American Tree Sparrowの寿命は何ですか？

2-8 年

American Tree Sparrowのtop Speedは何ですか？

35 km/h

American Tree Sparrowは何を食べますか？

During the winter, they rely almost exclusively on the seeds of grasses, weeds, and birch trees. In summer, they shift to a high-protein diet of insects and spiders to support breeding.

American Tree Sparrowは通常どこに生息していますか？

Found in open shrubby tundra during the breeding season, and weedy fields, forest edges, and suburban backyards during the winter.