لماذا لا تقع الطيور عن الشجر عندما تنام؟

31 ديسمبر 2013

لماذا لا تقع الطيور عن الشجر عندما تنام؟

عندما يجلس الطائر على الشجرة، فإن وزن الطائر يضغط على وتر موجود في الجزء الخلفي من كاحله، هذا الضغط يسبب انثناء وتشابك اصابع قدميه حول غصن الشجرة، حيث تحتاج عملية ابعاد الطائر عن الشجرة جهدا اكبر من بقائه عليها. وعندما يقف الطائر ترتخي اصابعه.

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أخر المواضيع من قسم : طيور

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