Spotted Tussock Moth (Lophocampa maculata) lives in deciduous forests across North America. It feeds on tree leaves mostly.
Fascinating facts about the Spotted Tussock Moth
- A single female can lay up to 200 eggs in clusters of 5-15, each about 1 mm long, and those eggs darken as they develop. After roughly a week the hatchlings emerge at just 2 mm, sporting pale bodies, black heads and long black hairs. The sheer number of eggs per season, around 150-200.
- Spotted tussock moth caterpillars grow to about 40 mm in their final instar, displaying a bold orange or yellow hair band flanked by black hair at each end with white tufts. This striking pattern mimics the toxic American dagger moth, a classic case of Batesian mimicry that deters predators who associate bright orange or yellow with danger. The hairs also act as a physical barrier, making the larvae less palatable and protecting them while they voraciously chew the leaves of poplars, willows, alders, birches, maples and oaks.
- Across North America the moth occupies elevations from sea level up to 2 600 m (8 530 ft), thriving in any deciduous forest where its host trees grow. Its distribution is limited more by the presence of suitable trees than by temperature, humidity or other micro-climate factors. This flexibility lets it span from southeastern Alaska through the Rockies to the Atlantic coast, yet it remains uncommon in many parts of its range, concentrating in the Adirondacks and along the Pacific coast where host trees are abundant.
- Adult moths are nocturnal flyers active from May to July, living only 5-10 days, during which they locate mates using pheromones and are attracted to moonlight or artificial lights. Their brief adult phase means they lay a large batch of eggs before dying. This short lifespan, combined with their reliance on light for navigation, explains why they are frequently caught in light traps and why females often congregate near street lamps during the breeding season.
- Most populations produce one generation per year, but a distinct California group is bivoltine, producing two generations annually. The bivoltine trait is unique to that region; no other populations have shown a second generation.
Sources
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At a glance
RangeNorth America
HabitatDeciduous forests
DietTree leaves mostly
About the Spotted Tussock Moth
In the dappled light of a forest glade, the Spotted Tussock Moth dances through the air, its delicate wings beating in a hypnotic rhythm as it navigates the intricate web of branches and leaves. With a subtle flutter, it alights upon a sun-kissed twig, its vibrant spots and soft, fuzzy plumage glistening like a whispered secret, as if the very essence of the forest had been distilled into this tiny, ephemeral creature. As it moves through its world, the Spotted Tussock Moth leaves a trail of wonder in its wake, a fleeting glimpse of beauty that is both fragile and resilient.
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