description Red Milkweed Beetle Overview
Tetraopes tetrophthalmus, commonly known as the red milkweed beetle, is a North American species of longhorn beetle in the family Cerambycidae. It is easily recognized by its bright red-orange coloration with black spots and its habit of feeding exclusively on milkweed plants (Asclepias). The beetle sequesters toxic cardenolide compounds from its host plant, rendering it distasteful to many predators. Its species name, meaning 'four-eyed,' refers to the fact that its antennae bases bisect each compound eye, creating the appearance of four eyes.
help Red Milkweed Beetle FAQ
What is the scientific name of the red milkweed beetle?
The red milkweed beetle is Tetraopes tetrophthalmus, a North American longhorn beetle in the family Cerambycidae. Its bright red-orange body often has black markings.
Why is it called the four-eyed milkweed beetle?
The name refers to the way each antenna appears to divide an eye, giving the beetle what looks like four eyes. The species name tetrophthalmus means four-eyed.
What does the red milkweed beetle eat?
Larvae feed on milkweed roots, while adults feed mainly on milkweed foliage and flowers. Common milkweed, Asclepias syriaca, is one of its important host plants.
Is the red milkweed beetle's red color a warning?
Yes, the red and black pattern is aposematic, meaning it can warn predators that the beetle is chemically defended. Tetraopes beetles can sequester cardenolides from toxic milkweed plants.
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