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'Tobacco hornworm' is the common name for 'Manduca sexta'. The common and the scientific names refer to the caterpillar and moth stages of the insect. But the term 'sexta' specifically identifies the six spots that are divided evenly on either side of the moth's abdomen. It's a way of telling the difference between it and the otherwise almost identical five-spotted hawkmoth [M. quinquemaculata], the adult stage of the tomato hornworm.

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15y ago

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