Fall Webworm Moth

Fascinating facts about the Fall Webworm Moth

• The fall webworm feeds on an extraordinary 636 different deciduous species, placing it among the most polyphagous insects known. In the eastern United States it especially favours pecan, black walnut, American elm, hickory, fruit trees and some maples, while in the western part it commonly uses alder, willow, cottonwood and fruit trees. This wide host range lets the larvae exploit almost any hardwood they encounter, ensuring survival across its vast distribution.
• The web that fall webworm larvae spin acts as a heat-trapping chamber, keeping the colony at roughly 40-50 °C. This elevated temperature lets the ectothermic caterpillars grow and develop more quickly than they would in open air. Within the web the centre can be noticeably hotter than the outer edges, although breezy conditions can disrupt the heat-retention effect.
• Caterpillars living in the communal web perform vigorous wiggles at regular intervals, and the entire group moves in striking synchrony. This coordinated shaking occurs even though individuals may be spread over a large portion of the web. The larvae remain inside the tented web until they reach the later instars, when they begin to consume whole leaves. The mechanism that produces such colony-wide timing is still unknown.
• After introductions in Europe and Asia, the fall webworm now occupies a holarctic range, from France to the Caspian Sea and into China, Mongolia and Russia. It was first brought to the former Yugoslavia in the 1940s, recorded in 1949, and has since spread across most of Europe and into Central Asian nations such as Turkmenistan, Uzbekistan, Kyrgyzstan and southeastern Kazakhstan.

Sources

Every fact above was checked against these pages, and kept only where one of them states it.

• Wikipedia

At a glance

About the Fall Webworm Moth

As the sun sets over the forest, the Fall Webworm Moth stirs, its delicate wings unfolding like a map of intricate highways and byways, guiding it on a gentle journey through the twilight air. With a soft, whispery flutter, it dances among the leafy branches, its pale yellow and dark brown hues blending seamlessly into the dappled shade, as it searches for the perfect spot to lay its eggs and begin the next chapter in the cycle of life. In this fleeting, moonlit world, the Fall Webworm Moth is a master of subtle beauty, its unassuming presence a reminder of the magic that unfolds just beyond the reach of human sight.

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