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This is Scientific American's 60-Second Science. I'm Marissa Fessenden. Got a minute?

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Adult ants communicate with pheromones, touch and even sound.

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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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The finding is in the journal Current Biology.

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Ants rasp and chirp by scraping a spike on their waist against a ridged section of their abdomen.

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But developing larvae are silent.

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So ants recognize them by chemical cues, size, shape, even squishiness.

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But the teenage versions of ants--the pupae--have hard outer shells that lack pheromones.

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However, pupae do have fully formed sound organs.

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The researchers thus recorded audio from the pupae and discovered clicking noises.

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The pulses' frequency and intensity are more like the adult workers' stridulations than the queen ant's song.

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The pupae's snaps are brief because their cases keep them from moving much.

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Still, the noise appears to work: when the researchers disturbed the nest, adult ants rescued noisy pupae before silent larvae.

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For ants, as for people, it pays to be the squeaky wheel.

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Thanks for the minute, for Scientific American's 60-Second Science. I'm Marissa Fessenden.

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