Cac con chim cung loai co the co tieng hot khac nhau
tuy thuoc vao moi truong noi chung song va “ngon ngu” cua chim song o
thanh thi co su khac biet rat nhieu so voi dong loai cu tru o thon que.
 Giao
su Yu Lijiang o Vien Nghien cuu dong vat thuoc Vien Han lam khoa hoc Trung Quoc
da thu am “tieng hat” cua chim chao mao khoang co (anh) – loai
chim hiem song chu yeu o Myanmar, Viet Nam, Lao, Campuchia, Thai Lan, Trung Quoc
– trong cac khu rung thuoc tinh Giang To. Ba nhan thay nhung con song gan trung
tam thanh pho co giong hot cao va trong treo trong khi tieng hot cua ho hang o
nong thon nghe em diu va tram lang hon.
Dieu nay co the do anh huong moi truong song, vung nong thon
it on ao hon thanh pho nen chim khong can hot cao giong. Song song do, giao su
Yu cung so sanh bang ghi am tieng hot cua chim chao mao o 5 thanh pho khac nhau
va phat hien duong nhu chung deu co “phuong ngu” rieng.
Theo ChinaDaily, Bao Can ThoArticle source http://w4rum.com/962.t
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