Bồ câu cảnh báo nguy hiểm bằng cánh
hi bồ câu bay lên không trung vì sợ hãi, đôi cánh của chúng tạo ra tiếng rít đặc biệt để cảnh báo những con khác.Ảnh: pbase.com.Nhiều nhà điểu học phỏng đoán rằng bồ câu có một cách nào đó để cảnh báo đồng loại khi chúng phát hiện mối nguy hiểm, bởi mỗi khi một con bay lên vì hoảng sợ, những con khác gần nó cũng đồng loạt bay theo.
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