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indian scops owl

Otus bakkamoena

Last update: 22 Mar 2026

Indian Scops Owl の基本情報

Scientific NameOtus bakkamoena
Status LC 低懸念
Size18-20 cm (7-8 inch)
Colors
Grey
Brown
Type
Night Birds
type
FamilyTypical Owls

はじめに

インドコノハズクOtus bakkamoena)は、南アジア全域に生息する小型の留鳥です。驚異的な擬態能力と夜行性のライフスタイルで知られ、生息域内で最も一般的でありながら、見つけるのが難しいフクロウの一種です。

外見・特徴

この種は通常、体長23〜25cmです。目立つ耳羽(羽角)を持ち、目は暗褐色またはヘーゼル色をしています。羽毛は淡黄色、灰色、茶色が混ざり合った保護色で、細かい暗色の筋が入っており、木の樹皮に完璧に溶け込むことができます。

生息地

インドコノハズクは適応力が非常に高く、落葉樹林、果樹園、都市部の庭園など、樹木のある生息地で見られます。人間の居住区に近い木々の多い場所でも頻繁に目撃されます。

食性

食性は主に昆虫食ですが、日和見的なハンターでもあります。一般的な餌は以下の通りです:

  • 昆虫(カブトムシ、バッタ、セミなど)
  • ネズミなどの小型哺乳類
  • トカゲ
  • 小鳥

繁殖と営巣

彼らは樹洞営巣性で、自然の木の洞や、キツツキなどの他の鳥が放棄した穴を利用します。繁殖期は一般的に2月から5月の間であり、メスは3〜5個の白い卵を産みます。

習性・行動

厳密な夜行性であるため、インドコノハズクは日中、茂った葉の中や木の穴で休息して過ごします。夜間に一定の間隔で繰り返される、柔らかく問いかけるような「フッ」という鳴き声が最もよく知られています。

保全状況 - LC 低懸念

インドコノハズクは現在、IUCNレッドリストで低懸念(LC)に分類されています。生息地の減少という課題はあるものの、人間が改変した環境に適応して生きる能力があるため、個体数は安定しています。

面白い事実

  1. コノハズク類の中で最大の種です。
  2. 多くのフクロウとは異なり、目は明るい黄色ではなく、暗色であることが多いです。
  3. 保護色が非常に効果的で、木の枝に座っている時でも、丸見えの状態でさえ見つけるのが困難です。

バードウォッチャーへのヒント

インドコノハズクを見つけるには、夕暮れ時にリズミカルな鳴き声に耳を澄ませることに集中してください。大きな古い木がある郊外の庭園や森林公園で、低輝度の懐中電灯を使って反射する目を探すのが効果的です。

まとめ

インドコノハズクは、自然界の擬態の素晴らしい例です。天然の害虫駆除業者として生態系で重要な役割を果たしており、私たちの庭や森林に存在することは非常に有益です。

Indian Scops Owl の分布図と生息域

Official Distribution Data provided by
BirdLife International and Handbook of the Birds of the World (2025)

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35-40 cm
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38-46 cm
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