英语听力：自然百科 大堡礁：自然奇迹—27

 A pair of noddy terns fly close together,over the island on the reef.They are two mates, reaffirming their bond.

 

Noddies signal to each other continually during courtship,both in the air and after landing.Once in the trees,the performance changes.They bow their heads repeatedly.It's pretty clear how they got their name.

 

 

To enforce their relationship,the male has to collect nesting materials,and the females are famously fussy,so he chooses his present carefully.

 

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