Ilia And Umber Underwings

catocala ilia-complex

The Ilia Underwing and its close relatives in the umber underwing complex represent some of the most fascinating examples of evolutionary camouflage in the insect world. By day, these medium-to-large moths rest quietly on the trunks of oak trees, perfectly blending into the rough bark with their highly mottled, cryptic grayish-brown forewings. However, when disturbed or in flight, they flash their strikingly vibrant orange-and-black banded hindwings. This sudden burst of color acts as a startle display to confuse potential predators, a defense mechanism known as deimatic behavior. Found throughout deciduous forests across North America, these moths are a favorite among nocturnal insect enthusiasts who marvel at their dual-natured beauty. If you want to identify Ilia And Umber Underwings in the wild, use the Snappit app.

Habitat: Found in deciduous and mixed-wood forests, specifically in close association with various species of oak trees.

Appearance

The Ilia Underwing moth typically has a wingspan ranging from 7 to 9 cm. Its forewings are incredibly intricate, displaying a mottled mix of charcoal gray, light brown, white, and black that perfectly mimics lichen-covered oak bark, often featuring a prominent white spot near the center. In contrast, the hidden hindwings are a brilliant, fiery orange or deep yellow, decorated with a thick, wavy black median band and a broad black outer margin. The body is stout and covered in fine, hair-like gray scales, allowing it to lay incredibly flat against flat wooden surfaces.

KingdomAnimaliaPhylumArthropodaClassInsectaOrderLepidopteraFamilyErebidaeGenusCatocala

Ilia And Umber Underwings

Interesting facts

The genus name Catocala translates roughly to beautiful behind or beautiful below, referring to their brilliantly colored hindwings hidden beneath drab forewings.

They rest with their heads pointing downwards on tree trunks, which helps them blend into the natural vertical patterns of the bark.

Underwing moths have been a favorite of lepidopterists for centuries, inspiring a rich subculture of baiting them with sweet, fermented mixtures at night.

Special abilities

Flashes its bright orange and black hindwings when threatened to startle predators and mask its escape.

Possesses forewings that expertly mimic tree bark and lichen, rendering the moth nearly invisible while resting during the day.

Equipped with tympanic organs on its metathorax that can detect the echolocation calls of hunting bats, allowing the moth to perform evasive maneuvers.

Measurements & details

Length: 3+ cm
Wingspan: 7+ cm
Weight: 0.001+ kg
Lifespan: 1+ years
Top Speed: 15 km/h
Clutch Size: 100+
Incubation: 200+ days

Diet & Feeding

Caterpillars feed exclusively on the foliage of oaks and occasionally other deciduous trees, while adult moths feed on fermenting tree sap, rotting fruit, and flower nectar.

Primary Foods

Oak leaves
Fermenting tree sap
Overripe fruit
Flower nectar

Foraging Method

Foraging

Ecological connections

host plant

White Oak

Quercus alba

The caterpillar of this moth species uses the leaves of this tree as its primary host plant and food source.

eaten by

Eastern Screech-Owl

Megascops asio

This nocturnal bird actively hunts adult underwing moths during the night.

eaten by

Black-capped Chickadee

Poecile atricapillus

Feeds on the caterpillars of the underwing moth in oak canopies during late spring.

Traits

No trait badges are assigned for this object yet.

Also known as

Catocala iliaIlia Underwing

Collections

Collections for this object will appear here as more themes are added.

Safety

Danger

1/5 · Very low

No special safety notes yet.

Frequently Asked Questions

How to identify Ilia And Umber Underwings?

The easiest way to identify Ilia And Umber Underwings is to use the Snappit nature identifier app.

How long is Ilia And Umber Underwings?

3+ cm

What is Ilia And Umber Underwings's wingspan?

7+ cm

How much does Ilia And Umber Underwings weigh?

0.001+ kg

How long does Ilia And Umber Underwings live?

1+ years

How fast can Ilia And Umber Underwings move?

15 km/h

What does Ilia And Umber Underwings eat?

Caterpillars feed exclusively on the foliage of oaks and occasionally other deciduous trees, while adult moths feed on fermenting tree sap, rotting fruit, and flower nectar.

Where is Ilia And Umber Underwings usually found?

Found in deciduous and mixed-wood forests, specifically in close association with various species of oak trees.