If you see this geometric mass in your garden, don’t touch it (Page 4 ) | September 11, 2024

Reproduction and Egg Laying

One of the first butterflies to appear in early spring, even before flowers have bloomed, the Mourning Cloak is a busy creature during mating season. After mating, the female uses trees or leaves as a canvas to lay clusters of berry-like eggs, which are an unforgettable sight. These tiny geometric shapes are intricate in design, and shortly before they hatch, they change color from golden yellow to black, creating a striking, otherworldly appearance.

The Caterpillar Stage: A Formidable Presence

Mourning Cloak caterpillars are just as unique as the butterflies they become. Generally black or dark brown, their bodies are covered with tiny spines, and they often have small white or yellow spots along their sides. Some even display reddish-orange markings near their head and tail ends. These caterpillars are voracious feeders, consuming large quantities of foliage as they grow. They often cause noticeable defoliation of host plants such as poplar, elm, or willow.

Despite their delicate appearance, these spine-covered caterpillars are not defenseless. When threatened, the young caterpillars, which live communally in silken webs, twitch in unison. This mass shuddering makes them appear less appealing to predators. While their tiny spines are not harmful to humans, they can cause mild skin irritation or a sting if handled. It’s always wise to avoid touching caterpillars with bare hands, particularly if you have sensitive skin or a history of allergic reactions.

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