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This is Scientific American's 60-Second Science. I'm Karen Hopkin. This'll just take a minute.
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Sometimes it pays to look like a pile of poop.
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At least if you're a tasty caterpillar trying to avoid getting eaten by hungry birds.
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Because a study in the journal Science shows that even young chicks tend to overlook caterpillars disguised as dung.
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Animals have come up with some pretty clever tricks for keeping themselves off a predator's dinner plate.
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Some use camouflage, adopting colors and patterns that help them blend into the environment.
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Others masquerade as something inedible, like bird droppings or twigs.
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But scientists got to wondering whether the two approaches are really so different.
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Maybe critters dressed as twigs also "blend in" so that predators just don't see them.
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To find out, scientists presented some twiggy-looking caterpillars to two sets of hand-reared chicks.
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They found that baby birds that had never seen sticks before gobbled those bad boys right up.
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But chicks who were shown real twigs first took much longer to peck at the mimics, and did so more gingerly than their na?ve friends.
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That means the birds could see the caterpillars, but were fooled by the costume, at least temporarily.
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Which, for a caterpillar on a leaf in the wild, could mean the difference between eating and being eaten.
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Thanks for the minute, for Scientific American's 60-Second Science. I'm Karen Hopkin.
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1 / 15
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显示原文 =This is Scientific American's 60-Second Science. I'm Karen Hopkin. This'll just take a minute.
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显示原文 =Sometimes it pays to look like a pile of poop.
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显示原文 =At least if you're a tasty caterpillar trying to avoid getting eaten by hungry birds.
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4 / 15
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显示原文 =Because a study in the journal Science shows that even young chicks tend to overlook caterpillars disguised as dung.
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5 / 15
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显示原文 =Animals have come up with some pretty clever tricks for keeping themselves off a predator's dinner plate.
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6 / 15
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显示原文 =Some use camouflage, adopting colors and patterns that help them blend into the environment.
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7 / 15
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显示原文 =Others masquerade as something inedible, like bird droppings or twigs.
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8 / 15
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显示原文 =But scientists got to wondering whether the two approaches are really so different.
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9 / 15
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显示原文 =Maybe critters dressed as twigs also "blend in" so that predators just don't see them.
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10 / 15
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显示原文 =To find out, scientists presented some twiggy-looking caterpillars to two sets of hand-reared chicks.
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11 / 15
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显示原文 =They found that baby birds that had never seen sticks before gobbled those bad boys right up.
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12 / 15
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显示原文 =But chicks who were shown real twigs first took much longer to peck at the mimics, and did so more gingerly than their na?ve friends.
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13 / 15
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显示原文 =That means the birds could see the caterpillars, but were fooled by the costume, at least temporarily.
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14 / 15
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显示原文 =Which, for a caterpillar on a leaf in the wild, could mean the difference between eating and being eaten.
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15 / 15
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显示原文 =Thanks for the minute, for Scientific American's 60-Second Science. I'm Karen Hopkin.
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- 单句循环：关
- 单句循环：×3
- 单句循环：×5
- 单句循环：∞