Agreeable Tiger Moth

Fascinating facts about the Agreeable Tiger Moth

• At just 28 to 42 mm across, the agreeable tiger moth fits in the palm of your hand, yet its orange "bib" on the front of the thorax. The wingspan ranges from 28 to 42 millimetres, with females usually slightly larger than males. The thorax is white, with a prominent patch of orange, ochreous, or yellow setae (hair-like scales) on the anterior part, just behind the head. This vivid contrast warns predators while giving naturalists a reliable field mark.
• A single female can lay several hundred over her life. The egg is spherical, about 0.6 mm in diameter, and pale yellow when first laid, darkening to grey before hatching. Eggs are laid in clusters on the underside of host plant leaves, usually in batches of 20 to 100. A single female may lay several hundred eggs over her lifetime, and another source notes she may lay 200 to 600 eggs over several nights.
• How many generations a moth produces each year depends on where it lives, ranging from one in the north to three in the deep south. The species has one to three generations per year depending on latitude and climate. In the northern parts of its range (Canada, northern New England, the Great Lakes), the species is univoltine, producing a single generation per year. In the mid-Atlantic and midwestern states, it is bivoltine, with two generations. In the deep South, from the Carolinas to Texas and Florida, it may be trivoltine, with three overlapping generations in a long growing season.
• Both caterpillars and adults carry a chemical shield borrowed from the plants they eat, and their stark white-black-orange pattern shouts "stay away" to hungry birds and bats. Tiger moths are famous for their chemical defenses, and the agreeable tiger moth is no exception. Like many arctiines, the larvae sequester secondary plant compounds, including alkaloids and cardiac glycosides, from their host plants. These compounds are retained through metamorphosis and are present in the adult moth, making both larvae and adults distasteful to vertebrate predators such as birds, bats, and small mammals. The bright, aposematic colouration of the adult (white with contrasting black spots and orange bib) serves as a warning to visual predators. Together, chemistry and colour create a double-layered defense that reduces predation pressure across its range.
• From the pine-scented meadows of Maine to the sun-baked fields of Texas, the agreeable tiger moth blankets most of the United States and southern Canada, and a puzzling record even hints at a far-off Indian population. The agreeable tiger moth ranges across most of the contiguous United States, southern Canada, and there is some evidence of disjunct populations in India. It inhabits open woodlands, meadows, fields, roadsides, and suburban gardens. In the United States, it occurs from Maine south to Florida, and west to Texas, Oklahoma, Kansas, Nebraska, and the Dakotas. It occurs throughout the Midwest and the Great Lakes region. In Canada, the species is found in Ontario, Quebec, New Brunswick, Nova Scotia, and possibly Manitoba and Saskatchewan, though northern records are sparse. Its broad habitat tolerance explains why it thrives in both natural and human-altered landscapes, making it a common night-time visitor to porch lights across North America.

Sources

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

• Wikipedia

At a glance

About the Agreeable Tiger Moth

As the sun dips below the horizon, the Agreeable Tiger Moth stirs, its soft, pale fur fluffing gently in the evening breeze as it takes to the air, its delicate wings beating in a hypnotic rhythm. With a subtle sheen to its coat, like the first whispers of moonlight on a summer's night, this enchanting creature dances through the twilight, leaving a trail of wonder in its wake. As it flits from flower to flower, its very presence seems to embody the carefree spirit of the night, unencumbered by the worries of the world, and yet, utterly captivating to behold.

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