Description
Black Swallowtail Butterflies go from egg to adult butterfly in about a month if the weather is warm, and their food quality is good. Things take longer if the weather is cooler or the food situation isn't good. Starting as an egg, it takes 3 to 10 days to hatch, then 10 to 28 days as a caterpillar, then 10 to 20 days as a chrysalis. After the adult butterfly emerges, they only live about 1 or 2 weeks.
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