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ML248049481

Northern Harrier Circus hudsonius

報告

投稿者

Nicole Richardson この投稿者による視聴覚メディア プロフィール

日付

3日 7月 2020年 eBirdチェックリスト S71091289

場所

Ontario, CA (48.908, -89.986)
Thunder Bay, Ontario, Canada
この場所の視聴覚メディア 図解チェックリスト
地図
地図 座標: 48.9084962, -89.9859043
年齢と性別
成鳥メス - 1
音声
地鳴き
プレイバック(音声の再生)
指定なし

視聴覚メディア・ノート

Female alarm call.

観察結果の詳細

As I walked up to end of road, female flew up and began to call, apparently in response to my presence. She remained some seventy meters away, alarming, until suddenly her call switched to a single note shriek and she took off toward the back side of the clearing. The male had arrived, and she flew to him, the two spun and fluttered at each other, and he came by to quietly to circle a few times and leave as the female fell silent while I continued to walk in the opposite direction. As I returned to the car past here, however, she came closer and her alarms grew louder, more fervent. I took a few steps in her direction, and she soon began to dive bomb me, soaring wide and tucking in to fly straight at my face, holding eye contact. After some time the male appeared, too, with prey in his talons, and when he arrived the female shrieked again as she flew up to him. She took the food from him and went to perch nearby, and he took up the task of trying to convince me to leave. His tactic was different to the female, however, and he circled me, alarming, swooping close just once and perching very infrequently. Eventually I spotted the nest, a broad, shallow depression in the sphagnum bordered with a handful of sticks, lightly lined with dried grass and surrounded about 200° by bushes. Four fuzzy dumplings were strewn awkwardly across the nest, one tucked just on the edge of the cup, presumably taking advantage of available shade. Largest chick nearly twice the size of smallest. Photos taken.

テクニカル・インフォメーション

レコーダー
マイク
アクセサリ
オリジナルのファイルサイズ
5.32 MB

Cornell Lab of Ornithology

Collections and Guides

  • Cornell Guide to Bird Sounds: United States and Canada
  • Radio Expeditions
  • Internet Bird Collection
  • Oriental Bird Club Image Database

リソース

  • 視聴覚メディアの準備・アップロード
  • 録音のヒント
  • 視聴覚メディアの利用と評価
  • 視聴覚メディアのリクエスト
  • ターゲット
  • 写真+音声クイズ
  • 音声編集指導書
  • 録音アプリの設定
  • 録音機材を選ぶ
  • 録音ワークショップ
  • 学生向けの機会

概要

  • 沿革
  • チーム
  • 連絡先
  • 土地の承認
  • ウェブアクセシビリティーのサポート
  • プライバシーポリシー
  • 利用規約
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