very big caterpillar
Hi,
We found this bug in our back yard in Winnipeg, Manitoba, Canada. Can you tell us what it is? Will it be a moth? It was the biggest caterpillar we had ever seen!! It was at least 3 inches long and quite sturdy. Thanks,
Melanie Stevenson

Hi Melanie,
This is a Four Horned Sphinx or Elm Sphinx caterpillar, Ceratomia amyntor. There is a brown form which we recently posted as well as the green form you have sent in.

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