Texas Imperial Moth

Eacles imperialis nobilis

Classification

Phylum: Arthropoda
Subphylum: Hexapoda
Class: Insecta
Order: Lepidoptera
Superfamily: Bombycoidea
Family: Saturniidae
Subfamily: Ceratocampinae
Genus: Eacles
Species: imperialis
Subspecies: nobilis

Pronunciation

How to pronounce Eacles imperialis nobilis: /ˈiː.æ.kliːz ɪmˌpɪə.riˈælɪs ˈnɒb.ɪ.lɪs/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Summary

Eacles imperialis nobilis, commonly known as the Texas Imperial Moth, is a subspecies of the imperial moth prevalent in southeastern Texas. It is known for its striking coloration and significant variation among individuals. The species faces conservation challenges due to habitat loss and pesticide usage.

Physical Characteristics

Wingspan between 80 and 175 mm (3+1⁄8 and 6+7⁄8 inches) with primary yellow coloration featuring red, brown, and purple blotches; larvae range from 10–15 mm long in the first instar to 3–5.5 inches (75–100 mm) in the fifth instar, exhibiting color morphs of dark brown, burgundy, and green.

Identification Tips

Look for the characteristic yellow wings with varying dark markings; males are more heavily marked and generally have broader antennae than females.

Habitat

Associated with forests, rural areas, and suburban habitats across southeastern Texas and other parts of its range.

Distribution

Native range spans from Argentina to Canada, including the East of South America and North America from the Rocky Mountains to the Atlantic Coast, historically recorded from New England to southern Canada, and to the Florida Keys.

Diet

Larvae feed on various host plants, primarily species from the families Pinaceae, Fagaceae, and other deciduous trees.

Life Cycle

The species has a single brood each year with adults emerging in spring or late summer depending on the region. The lifecycle includes egg, larval (five instars), pupal, and adult stages.

Reproduction

Females lay eggs at dusk singly or in small groups on host plants; eggs typically hatch in 10 days to two weeks.

Predators

Adults are vulnerable to various predators, particularly while mating.

Conservation Status

Eacles imperialis is experiencing regional decline in the northeastern US, particularly in New England; factors include habitat fragmentation and pesticide use.

Ecosystem Role

As a larvae, they contribute to plant growth regulation by feeding on various host plants; adults serve as prey for other wildlife.