Encounters with caterpillars in gardens often prompt questions about their potential danger. The Angle Shades caterpillar (Phlogophora meticulosa) is a common species found in various habitats, including residential areas. Understanding its characteristics and behaviors can help alleviate concerns. This article clarifies whether the Angle Shades caterpillar poses any threat to humans or pets.
Identifying Angle Shades Caterpillars
Identifying an Angle Shades caterpillar involves observing distinct features. They vary in color, appearing in shades of dull green, brownish-green, or pinkish-brown, and typically grow up to 45 millimeters (about 1.75 inches) long.
Characteristic markings include a fine, pale whitish line down their back, sometimes interrupted, and often a broad pale band along the side. Some may also have small white dots or reddish spots along their sides. The head color ranges from green to mottled brown. As they mature, faint V-shaped angled lines may appear on their back.
Are Angle Shades Caterpillars Dangerous?
A primary concern regarding caterpillars is whether they possess stinging hairs or toxins. The Angle Shades caterpillar is considered harmless to humans and pets. They do not possess urticating hairs, specialized barbed bristles found on some other caterpillar species that cause skin irritation or allergic reactions.
They are not reported to be poisonous if touched, nor are they considered toxic if accidentally ingested (though ingesting any wild insect is not recommended). They also do not bite humans, as their mouthparts are adapted for chewing plants. Their primary defense strategy involves camouflage, where their coloration helps them blend seamlessly with their plant surroundings, mimicking leaves or twigs. They typically hide during the day and feed at night, reducing their visibility to predators.
Safe Handling and Coexistence
Given that Angle Shades caterpillars are harmless, safe handling involves gentle interaction. If relocation is necessary, gently move them using a leaf or small stick, rather than direct skin contact. They can be transferred to alternative host plants such as nettle, dock, or bramble, where their feeding will not cause undesirable damage.
These caterpillars and the adult moths play a role in the local ecosystem. They serve as a food source for various garden wildlife, including birds, wasps, hedgehogs, and ground beetles. The adult Angle Shades moths are also pollinators, attracted to various flowers where they assist in plant reproduction. Allowing them to coexist in a garden contributes to biodiversity.