Caterpillar Season

Cindy Travis and Sue Ann Kendall

From Cindy:

I found a dozen of these caterpillars devouring my dill. When there was nothing but a stem left, they crawled up the side of my planter and crawled away. I thought they might find the nearby parsley and ingest it too, but no sign of that and no sign if them.

I suppose they are somewhere nearby spinning their cocoons.  Maybe I’ll see some pretty black swallowtails around soon if my nesting phoebes and barn swallows or bluebirds don’t get them first!

From Sue Ann:

I have had many of these in my bronze fennel plant, and I hope they have gone off to pupate, too! The fennel also hosted the caterpillar of the cabbage looper moth. I’ll plant dill next year, for sure. The more black swallowtails, the better!

More about the Black Swallowtail, from Cindy

Papilio polyxenes, the black swallowtail, American swallowtail or parsnip swallowtail, is a butterfly found throughout much of North America. It is the state butterfly of Oklahoma and New Jersey. Wikipedia

Eastern black swallowtail. Photo by @AngelsLight via Twenty20. Licensed use.

Black Swallowtail Life Cycle: Overview and Timings

StageTypical Duration
Egg stageGenerally 4 to 10 days, depending on temperature and host plant
Caterpillar (larval) stage3 to 4 weeks
Chrysalis (pupal) stage10 to 20 days (except for overwintering pupae)
Adult butterfly stage6 to 14 days
Facts about the Black Swallowtail

And More from Sue Ann

I had to add this observation from last night, as I was dining outdoors at the Central Avenue Bistro in Cameron (with safe distancing and all that). I felt something prickling my ankle and looked down to find this fellow. It must be on the last instar, because it’s big! I believe it’s a live oak metria moth (Metria amelia) given that it and many friends were falling from the live oak tree we were sitting under, though iNaturalist has yet to confirm me.

Hard to tell the front from the back of this one!

The moth looks like this, which really would blend right in with an oak tree!

Live oak metria moth. iNaturalist photo by xylochic627 (CC-NY-NC)

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