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When a sphinx moth becomes an adult caterpillar, it will go underground to pupate. Most common sphinx moths will overwinter underground and hatch out in the early summer. However sphinx moths that are located in warmer, more tropical regions only take 2-3 weeks to hatch.

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10y ago
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13y ago

my anwer is they stay in there coocoons for a spring

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12y ago

They stay in for 2 hours

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Q: How long does a sphinx moth stay in its cocoon?
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