Anarta trifolii

The Nutmeg

(c) Igor Balashov, some rights reserved (CC BY) · licence

Family: Noctuidae · Class: Insecta · Order: Lepidoptera

Anarta trifolii (The Nutmeg) is a California animal in the Noctuidae family.

The Nutmeg (Anarta trifolii) is a medium-sized noctuid moth with a wingspan of approximately 32-38 mm. The forewings display a distinctive mottled pattern of brown, gray, and reddish-brown coloration with darker cross-lines and a prominent kidney-shaped reniform spot. The hindwings are pale gray to whitish with darker marginal shading. The thorax and head match the forewing coloration, while the abdomen is typically grayish-brown. This species occurs across much of northern North America, with populations documented from Alaska and Canada south through the western United States. In California, The Nutmeg has been recorded in the Sierra Nevada and other mountainous regions, typically at elevations between 5,000 and 9,000 feet. Collection records from lepidopterist surveys indicate the species occurs in Fresno, Inyo, and other counties in the state's mountain ranges. The Nutmeg inhabits coniferous forest ecosystems, particularly areas dominated by fir, pine, and other montane conifers. Adults are most commonly encountered in open forest clearings, meadow edges, and areas with mixed coniferous and deciduous vegetation. The species shows a preference for cooler, moister habitats typical of higher elevation forest zones. Larvae are believed to feed on herbaceous plants, though specific host plant relationships in California have not been thoroughly documented. Adults are active during the summer months, with flight periods typically extending from May through August depending on elevation and local climate conditions. Peak activity occurs in June and July based on collection records from western states. The species is nocturnal and readily attracted to ultraviolet and mercury vapor lights, making it relatively accessible to researchers and collectors. Seasonal activity patterns suggest a single generation per year in most locations, with overwintering likely occurring in the larval or pupal stage. The Nutmeg is listed as a Species of Greatest Conservation Need in New York State's Wildlife Action Plan, indicating regional conservation concerns in parts of its range. However, the species' conservation status in California has not been formally assessed. Population trends and specific threats are not well documented, though habitat loss and fragmentation of montane forest ecosystems could potentially impact local populations. Climate change may pose additional challenges through alteration of suitable habitat zones and shifts in forest composition at higher elevations. While The Nutmeg appears to maintain stable populations across much of its western range based on continued collection records, the species would benefit from more comprehensive surveys to better understand its distribution, abundance, and ecological requirements in California. Current knowledge of this moth's biology remains limited, particularly regarding larval host plants, population dynamics, and specific habitat preferences within the state's diverse mountain ecosystems.

Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, and more.