Monark butterfly3/23/2023 Third instar Monarch Butterfly caterpillars have distinct stripes and recognizable tentacles. They are covered in hair and develop little bumps where they will later grow long tentacles. Second instar Monarch Butterfly caterpillars begin to show stripes as they grow up to a centimeter long. Some individual caterpillars eat their old skins. In warm weather, Monarch Butterfly larvae may be ready to pupate two or three weeks after they hatch. Each instar can last as long as a week but typically lasts half a week. Like most caterpillars, Monarch Butterfly caterpillar’s lives are divided into five instars (the time it takes them to outgrow one skin and burst out in a new one). These caterpillars are less than a centimeter long, greenish and translucent, and very easy to overlook as they eat the shells from which they hatched and begin nibbling little holes in milkweed leaves. Within a week, the eggs hatch into baby Monarch Butterflies. The first generation of Monarch Butterfly eggs, which look like tiny pale yellowish beads, may be laid as early as February in the Southern States, as Monarchs return from hibernation in Mexico and California.
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