Difference between legs of Marsh Tit <i>Poecile palustris</i> and Willow Tit <i>P. montanus</i> in Hokkaido
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- TAKADA Reiko
- Nemuro Nature Research Group
Bibliographic Information
- Other Title
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- 北海道産ハシブトガラ<i>Poecile palustris</i>とコガラ<i>P. montanus</i>の脚の差異
- 北海道産ハシブトガラPoecile palustrisとコガラP. montanusの脚の差異 : 両種の識別点としての後趾爪の有効性
- ホッカイドウサン ハシブトガラ Poecile palustris ト コガラ P. montanus ノ アシ ノ サイ : リョウ シュ ノ シキベツテン ト シテ ノ ゴシツメ ノ ユウコウセイ
- —Effectiveness of hind claw as criteria for species separation—
- ―両種の識別点としての後趾爪の有効性―
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Description
We compared the leg structure of 174 Marsh Tits Poecile palustris and 95 Willow Tits P. montanus from Hokkaido, Japan. Overall, the Willow Tit had a significantly longer hind claw, middle claw, and tarsus than the Marsh Tit. In Marsh Tits, 99% of the hind claws were 7.1 mm long or less, and tended to have a strong curvature with a blunt tip. But in Willow Tits, 98% of the hind claws were 7.2 mm long or more, and tended to have a weak curvature with a sharp tip. Therefore, these hind claw characteristics are very effective as criteria for species separation, regardless of age or season.
Journal
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- The Bulletin of the Japanese Bird Banding Association
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The Bulletin of the Japanese Bird Banding Association 30 (1), 14-23, 2018
The Japanese Bird Banding Association
