Convolvulus Hawkmoth

It’s been almost a year exactly since I shared a photograph of an unknown caterpillar that was devouring the basil plant in my garden. A few months ago, my students and I were able to successfully raise one of those critters indoors and finally identify it as a Convolvulus Hawkmoth (Agrius convolvuli)!

Again, we had found the caterpillar munching my basil plant, but my husband and I have also found eggs on a sweet potato plant at his farm.

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The eggs are smooth, greenish spheres and are laid on the underside of leaves. The larvae will eat a range of plants, including but not limited to daisy, taro, morning glory, sunflower, purslane, and some legumes. And as we’ve learned – basil and sweet potato!

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The young caterpillars are green with a straight horn on their tail ends, but the larvae will go through five instar phases, molting its skin at each stage.

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Later instars develop pale diagonal stripes and their horns curve backward. Even later instars may become dark brown. The caterpillars are quite large, growing up to 8 cm in length.

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Our caterpillar buried a few centimeters under gravel and leaf litter to form its pupa, which was glossy and reddish brown. The moths spend between 5 and 26 days in this stage.

Hawkmoth Pupa

Adults Convolvulus Hawkmoths are grey with light and dark patterns. The abdomen has pink patches on the side of each segment.

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I have never seen these moths flying, but like other hawkmoths, they are able to hover in flight.

I am thrilled that we were able to raise this – my first! – moth and share our discoveries with you! Have you ever raised butterflies or moths at home? It truly is a fascinating experience.

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