雀仔無牙係點解?~好急架~thanks
回答 (2)
2006-12-08 9:09 pm
Beak is light and good for flying.
It has a streamlineded shape to reduce the air friction during flying.
lt is sharp enough to kill prey without open their beak.
It has a streamlineded shape to reduce the air friction during flying.
lt is sharp enough to kill prey without open their beak.
參考: myself
2006-12-08 6:12 am
birds have no teeth to save weight for better flight.
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