LepidopteraNoctuidae – Owlet Moths

Euxoa tristicula - Hodges#10723

Euxoa tristicula

This record describes Euxoa tristicula (species). Recorded family: Noctuidae. Recorded order: Lepidoptera.

Identification and Appearance

Euxoa tristicula - Hodges#10723 - Euxoa tristicula — Contributed by Ian Maton; Additional contributions by marcie oconnor

Head and body grey, with a contrasting black thoracic collar. The forewings are light grey, with the costa even paler, especially near the base. The normal lines are obsolete or nearly so, indicated by a few dark scales at best. There is a prominent black basal streak, and the area proximal to the orbicular and between the orbicular and the reniform is filled with black scales. The subterminal line is faintly marked with dark scales, especially near the costa. The fringe is grey. The hindwings are dirty white, with the veins lightly marked with darker scales. The fringe is white. Form nesilens lacks the prominent black markings on the forewings and the thoracic collar. The relatively large size, pale grey color and sharp black markings will separate most tristicula from other Euxoa sp. Euxoa tristicula belongs to the subgenus Pleonectopoda, characterized by the prominent twist or subbasal coil in the vesica of the male. This description from E.H. Strickland Entomological Museum The above text from E.H. Strickland Entomological Museum Other images at MPG and CBIF

Classification

Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera (Butterflies and Moths)
Superfamily: Noctuoidea
Family: Noctuidae (Owlet Moths)
Subfamily: Noctuinae
Tribe: Noctuini
Genus: Euxoa

Imported taxonomy record. Source availability varies; see the source references and editorial policy below.

Habitat and Range

Habitat

Cultivated areas and dry open habitats with light soils

Seasonal Activity

late May-early September

About Butterflies and Moths: the wider group

Order-level background for Lepidoptera, the group containing Euxoa tristicula. Species-specific details appear above.

Group overview

Lepidoptera includes approximately 180,000 described species of butterflies and moths. Moths outnumber butterflies roughly 10:1. The monarch butterfly's eastern population has declined by more than 80% since the mid-1990s, and the western population by over 95% since the 1980s. The IUCN lists the migratory monarch as Vulnerable.

Ecological role of the group

Butterflies and moths are essential indicators of ecosystem health. As caterpillars, they are a primary food source for birds - a single nest of blue tit chicks requires ~10,000 caterpillars. Adult moths pollinate many night-blooming plants.

Economic and practical significance of the group

Lepidoptera are critical pollinators. In Europe, grassland butterfly species have declined by almost 50% since the early 1990s. In the UK, three-quarters of butterflies are in decline. In the U.S., five butterfly species have gone extinct since 1950, with 29 listed as endangered.

Recorded sources for this group: IUCN Red List, Xerces Society, USFWS, PNAS, WWF. Imported estimates may describe particular regions or reporting periods.

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