Spongy Moth

Fascinating facts about the Spongy Moth

• It is listed among the world's 100 worst invasive alien species because its larvae eat a wide range of deciduous and coniferous trees, often causing severe damage during mass-reproduction years. Outbreaks can reach densities of more than 2 500 000 caterpillars per hectare, one of the most extreme recorded in the United States. From 1970 to 2013 the moth stripped roughly 33 000 000 ha of forest, illustrating the scale of its impact.
• The replacement name 'spongy moth' was chosen because the egg masses have a spongy texture, a description that appeared in the Society's proposal. In June 2021 the Entomological Society of America's board voted to drop the former name, calling it hurtful to Romani people. A consultative process followed, and in January 2022 the Society put forward the new name, which was formally approved by a 16-member board in March 2022.
• Since its introduction to North America, the moth's frontier has advanced about 21 km each year, steadily expanding the area of defoliation. Between 1970 and 2013 this spread resulted in the loss of roughly 33 000 000 ha of forest, a massive footprint for an invasive insect. The species first arrived in the United States in 1869, when it was imported from Europe in search of a silk source.
• During recent outbreaks the moth has produced staggering numbers of larvae, with some sites reporting more than 2.5 million caterpillars per hectare. These densities rank among the most severe ever documented in the United States, and they have been recorded across the northeastern and mid-western regions. The problem has persisted for several years, with some areas battling the infestation for five consecutive seasons.
• Artist-astronomer Étienne Léopold Trouvelot first brought the moth to North America in 1869, importing it from Europe while seeking a silk source to replace cotton during the Civil War shortage. That single introduction set off a lasting invasive pest problem, prompting the spread of the species across the continent.

Sources

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

• Wikipedia

At a glance

About the Spongy Moth

As the sun sets over the forest, the spongy moth emerges, its delicate wings beating in a hypnotic rhythm as it dances through the trees, leaving a trail of silky threads in its wake. With an insatiable appetite, this voracious insect devours the leaves of its host plants, its caterpillars marching in unison like a tiny, hungry army, their spongy bodies a testament to their remarkable adaptability. As the seasons pass, the spongy moth weaves its own unique narrative, a tale of transformation and resilience, played out against the ever-changing backdrop of the natural world.

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