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1 .This is Scientific American's 60-Second Science. I'm Marissa Fessenden. Got a minute?
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2 .Adult ants communicate with pheromones, touch and even sound.
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3 .Now, researchers have discovered that developing ants, called pupae, have their own distinctive calls, which identify their social status within the colony.
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4 .The finding is in the journal Current Biology.
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5 .Ants rasp and chirp by scraping a spike on their waist against a ridged section of their abdomen.
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6 .But developing larvae are silent.
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7 .So ants recognize them by chemical cues, size, shape, even squishiness.
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8 .But the teenage versions of ants--the pupae--have hard outer shells that lack pheromones.
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9 .However, pupae do have fully formed sound organs.
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10 .The researchers thus recorded audio from the pupae and discovered clicking noises.
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11 .The pulses' frequency and intensity are more like the adult workers' stridulations than the queen ant's song.
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12 .The pupae's snaps are brief because their cases keep them from moving much.
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13 .Still, the noise appears to work: when the researchers disturbed the nest, adult ants rescued noisy pupae before silent larvae.
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14 .For ants, as for people, it pays to be the squeaky wheel.
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15 .Thanks for the minute, for Scientific American's 60-Second Science. I'm Marissa Fessenden.
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