Gulf Fritillaries?

So I have a purple Passion vine that draws in Fritillary butterflies this year I have actually gotten to see the caterpillars and was wondering if the

So I have a purple Passion vine that draws in Fritillary butterflies this year I have actually gotten to see the caterpillars and was wondering if there was a way to tell when there were ready to cocoon the biggest one is about 2 and 1/2 inches almost 3 so I would think he is getting close but I was wondering if there was a way to tell. I have had tons of caterpillars in the past but never this species. So I was hoping to learn a bit more..

or:So I have a purple Passion vine that draws in Fritillary butterflies this year I have actually gotten to see the caterpillars and was wondering if there was a way to tell when there were ready to cocoon the biggest one is about 2 and 1/2 inches almost 3 so I would think he is getting close but I was wondering if there was a way to tell. I have had tons of caterpillars in the past but never this species. So I was hoping to learn a bit more..

or:The fritillary butterfly is one of the thousands of different kinds of butterflies that beautify our world and one of the over 750 species that can be found in the United States and Canada. Depending on the kind of butterfly, life begins as a tiny egg laid on the leaf of a plant that will be eaten by the larva\u2014or better known by its other name, caterpillar\u2014when it hatches. Some eggs may develop into caterpillars within three short days. Other eggs laid in the fall will pass the winter before hatching.The smallest known butterfly specimen, pygmy blue (Brephidium exilis) of North America, is less than one half inch [1\u00a0cm] in wingspan. The largest is the Queen Alexandra\u2019s birdwing (Ornithoptera alexandrae) of the South Pacific, which can have a wingspread of 11\u00a0inches [28. \u201cYou are worthy, Jehovah our God, to receive the glory and the honor and the power, because you created all things, and because of your will they came into existence and were created.\u201d Revelation 4:11.For more information on this subject and others, please go to jw.org \"Online Library.\"Also for free downloads, publications or read online.

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