Io Moth
Interesting Facts about the Io Moth
Many moths have interesting traits or characteristics, but one that is particularly interesting in appearance is the io moth, perhaps better known as the peacock moth.
A silk moth of North America, the io moth is a smaller version of this distinctive family. The adults do not feed as there is no mouth feature. The female, with a wing span of approximately 3 inches, is larger than the male and has slight color differences. The purplish-brown forewings distinguish the female from the male, who forewings are mainly yellow with swirled designs scattered about. A truly unique feature of both sexes lies in the placement of a black dot on each under wing, giving them the appearance of a gremlin face peering out from under the forewings. These dots lend the association to peacocks, and also to a “bullseye” nickname owned by a near cousin, the Mexican Bullseye moth.
The adult io moths are nocturnal and early birds at that. Using only the first few hours of night fall, the female emit a scent designed to attract males, whose large antennae hone in on the location of the females. Mating occurs; after which the female lays eggs in clusters of 20 or so on a variety of host plants, placing them on the undersides of leaves.
The larvae are orange when they first emerge from their eggs. Feasting upon the leaves of the host plant begins immediately, with the larvae molting their skins five times as they grow larger. Changing color from the original orange to a bright green, the io moth larvae also develop a series of clustered spines covering the majority of their bodies. These spines release poison at the slightest touch, causing substantial pain. As they mature, they will pupate; some will go to the ground in fallen leaves while others remain on the trees to wrap themselves in living greenery as they fashion their cocoons.
Leaving the cocoon takes mere minutes, as the adult moth pushes through the cocoon walls in late morning or early afternoon. The timing assures that their wings will be ready to take on flight as soon as it becomes dark outside. Once out of the cocoon, the io moth will travel to the nearest plant; pulling themselves up onto the plant while their wings dry out and fill with fluid supplied from the moth’s body. From here, the life cycle begins once again.
The io moth is a beautiful and fascinating creature. Protecting themselves from predators through their poisoned spikes while in larvae stage and through their “bullseye” style markings in their adult stage ensure their survival to the highest extent. This little beauty is a colorful sight and an interesting study throughout its lifetime.