Endrosis sarcitrella

The pale shoulder patch contrasting with the darker, speckled remainder of the forewing distinguishes this species from the similar brown house moth (Hofmannophila pseudospretella), which has more uniformly brown forewings. The dark central spot on the forewing is also a useful diagnostic feature. Adults can be separated from other small domestic moths by the combination of white shoulder patches and the overall pale ground color with dark speckling.

Adults have white or pale cream forewings with a distinctive dark brown or blackish spot near the center and scattered darker speckling. The shoulders (basal area of the forewing) are noticeably paler, giving the species its common name. Hindwings are pale grayish. Wingspan ranges approximately 15-20 mm. Larvae are whitish with a brownish head.

Strongly associated with human-built structures, particularly houses, barns, warehouses, and other buildings where stored products are kept. Also found in bird nests, especially those of domestic pigeons and poultry, where larvae feed on organic debris. Rarely occurs in natural outdoor habitats.

Native to the Palearctic region with records across Europe including Austria, Belgium, and the United Kingdom. Introduced and established in North America, Australia, New Zealand, and other regions through human commerce. Cosmopolitan in distribution due to synanthropic habits.

Adults are active year-round in heated buildings. In unheated structures or outdoor situations, peak activity occurs from late spring through autumn. Multiple overlapping generations occur annually in favorable conditions.

Larvae feed on a wide range of dry organic matter including stored grain, cereal products, dried fruit, nuts, seeds, wool, fur, feathers, dead insects, and other detritus. Has been reported from bird nests feeding on feces, feathers, and carcasses.

Complete metamorphosis with egg, larva, pupa, and adult stages. Females lay eggs on suitable food material. Larval development varies with temperature and food quality, potentially lasting several weeks to months. Pupation occurs in a silken cocoon, often within the food substrate. Generation time can be as short as 8-10 weeks under optimal conditions.

Nocturnal. Adults are attracted to light. Larvae are scavengers that web together food particles and debris while feeding. Capable of surviving extended periods without food. Adults do not feed.

Decomposer and scavenger in human-associated environments. Contributes to breakdown of organic debris in bird nests and stored product facilities. Serves as prey for various predators including spiders, parasitoid wasps, and insectivorous birds in building environments.

Significant pest of stored food products and natural history collections. Can infest grain, flour, dried fruit, nuts, and other stored goods. Damages wool, fur, and feather items. Economic impact generally less severe than some other stored product moths, but persistent infestations occur in domestic and commercial settings. Control relies on sanitation, temperature management, and insecticides.

• Hofmannophila pseudospretellaBrown house moth with uniformly brown forewings lacking the pale shoulder patch; often found in similar habitats
• Tinea pellionellaCase-bearing clothes moth with more uniformly buff or brown coloration and distinctive larval cases

• BugGuide
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life