Comments on: How Does a Monarch Caterpillar Know When to Pupate? https://www.johnnybutterflyseed.com/2023/07/25/how-does-a-monarch-caterpillar-know-when-to-pupate/ Home of the Monarch Butterfly Mission Kit Wed, 28 Jan 2026 02:06:57 +0000 hourly 1 https://wordpress.org/?v=6.9.4 By: Monarch Butterfly Lifecycle Timeline – Johnny Butterflyseed https://www.johnnybutterflyseed.com/2023/07/25/how-does-a-monarch-caterpillar-know-when-to-pupate/#comment-5 Wed, 28 Jan 2026 02:06:57 +0000 https://www.johnnybutterflyseed.com/?p=14236#comment-5 […] the caterpillar reaches its maximum size, it forms a chrysalis, or pupa. The caterpillar hangs upside down from a leaf or twig and sheds its skin one last time. […]

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