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- 2021-1-17
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157.虎蛾和蝙蝠
[Main Idea]
Introduce the two animals and try to find out why bats don't eat Tiger moths.
[Structure]
P1-P2 Introduce bats.
P1: Bats hunt by sending high pitched sounds.
P2: Bats use the mechanism of echolocation to hunt insects, but not Tiger moths.
P3-P4 Introduce Tiger moths.
P3: Adult Tiger moths have toxins in their bodies.
P4: Tiger moths can produce and receive ultrasonic sounds.
P5-P6 Try to explain why don't bats eat Tiger moths.
P5: Tiger moths can hear bats' sounds and confuse them.
P6: Researches have proved that Tiger moths' ultrasounds were used to send messages rather than jam bats' sonar system.
P7 Need further study.
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