Soft Release of a Fledged Oriental White Stork (ciconia Boycia ) Using the Application of Brailing as Flight Restraint Method for Their Parents

27 Mar Soft Release of a Fledged Oriental White Stork (ciconia Boycia ) Using the Application of Brailing as Flight Restraint Method for Their Parents

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Abstract

放鳥拠点からコウノトリ幼鳥をソフトリリースするにあたり，親鳥への飛翔抑制法としてブレイリング（ビニールバンドを片側の翼に装着する方法）を初めて適用した．雛が巣立った後，親鳥に飛翔抑制のためにビニールバンドを装着して天井ネットを開放した．これにより巣立った幼鳥のみを自発的に放鳥拠点外に放鳥することができた．ブレイリングの実施期間中，ビニールバンドに起因した擦過傷等の異常およびビニールバンドの脱落による放鳥拠点からの脱出などの事故は生じなかった．本法は，コウノトリの飛翔抑制を行う期間を自由に設定することができ，装着個体にとっても安全であるため，従来行ってきた切羽による飛翔抑制方法に比べ，放鳥拠点からの本希少種のソフトリリースに有用な方法であると考えた．

English Abstract

Brailing (placing the plastic band on one side wing) as flight restraint was applied for the first time to the parents of the Oriental White Stork (Ciconia boycia ) at the period of soft releasing of young birds from the release base. The parent birds could brood the hatchling at the nest stage without placing the plastic band. Before the young birds were soft released from the cage, the plastic band was placed the wing of their parent birds and then the roof net was opened. Only young birds could fly to outside of the release base. There were no clinical symptoms such as scratch wound caused by the placing the plastic band and no accidental escape due to the removal of the plastic band during brailing period. It
is concluded that the brailing is useful method for soft release of the Oriental White Stork compared with other flight restraint methods such as feather clipping and pinioning of the wing.