Moth Of The Week

Moth of the Week

African Death’s-Head Hawkmoth

Acherontia atropos

The African death's-head hawkmoth is part of the family Sphingidae and is the most widely recognized of the three species of Death’s-Head Hawkmoth. The species was described in 1758 by Carl Linnaeus. Its common name comes from the skull shape on the back of its thorax. It’s binomial name comes from the river Acheron in Greece, which was believed to lead to the Underworld, and the Greek goddess Atropos respectively.

Description The forewings are black/brown with mottled shades of brown while the hindwings are buff orange with two black/brown stripes that curve with the edge of the hindwing. The head and thorax are the same black/brown color as the forewings interrupted by the brown skull on the back of the thorax. The abdomen is the same buff color as the hindwings with similar stripes of the same color. There is also a single stripe down the center of the abdomen called the “dorsal stripe.”

Average Wingspan: 13 cm (5 in)

Females are large than males with a rounded abdomen tip and larger, thicker antennae

Males have a pointed abdomen tip

Diet and Habitat Larva of this species mainly eat the leaves of potato plants which have alkaloids. The larva accumulate these toxins to become unpalatable to predators. Adults eat the nectar of flowers and stolen honey from the beehives of the Western Honey Bee. They are able to mimic the scent of bees and steal the honey undetected. They use their proboscis, a tube used to drink nectar and honey, to break the honey comb.

Their ranges stretches from the Middle East, as far south as the southern tip of Africa, as far north as southern Great Britain, as far east as India and western Saudi Arabia, and as far west as the Canary Islands and Azores. It is known to move into western Eurasia, but a majority do not survive the winter.

Mating This moth has multiple generations per year. In Africa, the broods are continuous. In the northern range, the larva overwinter in the pupal stage. Eggs are laid singly on the underside of species in mainly Solanaceae but also Physalis, Verbenaceae, Cannabaceae, Oleaceae, Pedaliaceae and others.

Predators This moth can emit a special squeak noise by sucking in air to vibrate a flap in its mouth and throat. The purpose of this squeak is unclear, but the two hypotheses are it is to scare away predators or to mimic the sound of a queen bee makes for the workers to stop moving to easier raid beehives for honey. They are also immune to bee venom and can mimic the scent of bees.

Fun Fact This moth has appeared many times in pop culture as symbols of death and evil:

It appeared in The Hireling Shepherd, Bram Stoker's Dracula, Un Chien Andalou, the promotional marquee posters for The Silence of the Lambs, in the music video to Massive Attack's single, "Butterfly Caught,” and on the American edition's cover of José Saramago's novel Death with Interruptions.

It is mentioned in Susan Hill's Gothic horror novel I'm the King of the Castle and John Keats’s "Ode to Melancholy.”

It is referred to in The Mothman Prophecies.

Finally, the moth is used as a calling card by the serial killer Buffalo Bill. However, in the movie script they are referred to under a different species of death’s-head hawkmoths.

(Source: Wikipedia, Simple English Wikipedia)

Moth of the Week

Antler Moth

Cerapteryx graminis

The antler moth is a part of the family Noctuidae. It was first described in 1758 by Carl Linnaeus. This moth gets its name from the antler shaped mark in its forewings.

Description This moth species has brown forewings, with a “basal streak” of white that branches out. This mark may vary in size per moth. The forewings show a mirrored pattern of the base brown broken up by the branches and a few spots and lines of lighter brown. The forewing also may or may not have black streaks. The hindwing is dark brown with a white fringe.

Males are smaller than females with fluffier antennae.

Male Wingspan: 27 - 32mm (≈1.06 - 1.26in)

Female Wingspan: 35 - 39mm (≈1.38 - 1.53in)

Diet and Habitat The larva of this species feeds on grasses such as Deschampsia, Sheep’s-fescue (Festuca ovina), Mat-grass (Nardus stricta) and Purple Moor-grass (Molinia caerulea). It has also been found on sedges and rushes. When the larva population is concentrated enough, they can damage pastures. Adults feed on flowers such as thistles and ragworts.

This species is common through most of Europe. It’s northernmost reach is Iceland and above the Arctic Circle. It’s easternmost reach is Siberia and North Mongolia. This moth does not occur in the dry southern regions of Europe. It has been introduced to North America. Additionally, this species inhabits the Alps. They prefer habitats of grassland, favouring acid upland pasture, moorland and downland.

Mating Adult moths are seen flying from July to September. They presumably mate in this time frame.

Predators This moth flies during the day, especially in the north, warm weather, and early mornings, and at night. They are presumably preyed on by both daytime and night time predators like birds and bats. They are attracted to light. To protect themselves during the day, this moth hides in the grass.

Fun Fact The antler moth rises to an altitude of 2100 meters in the Alps.

(Source: Wikipedia, Butterfly Conservation)

psst hey you you ever heard of the polyphemus moth

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Psst, hey! I have actually heard of this moth before, in fact it was one of my first Moth of the Week posts. You can find the post here!

Check ‘em out! :]

Moth of the Week

Canary-shouldered Thorn

Ennomos alniaria

The canary-shouldered thorn was first described in 1758 by Carl Linnaeus. It is a part of the family Geometridae. This moth gets its name from its bright yellow coloring.

Description This moth has a bright canary yellow head and thorax. The forewings and hindwings are a ochre yellow with gray speckles. Both the forewings and the hindwings are a scalloped shape and both have a single dot on each wing called “discal spots” with the spots being larger on the hindwing. The forewings have two curved lines going across them.

This moth looks very similar to the Dusky Thorn, August Thorn and September Thorn moths.

Wingspan Range: 34 - 42 mm (≈1.34 - 1.65 in)

Forewing Range: 16 - 20 mm (≈0.63 - 0.79 in)

Diet and Habitat The larva of this species feed off of deciduous trees such as downy birch, silver birch, alder, goat willow, elms, and limes.

This moth’s range stretches from Russia and the Caucuses region in the east to Western Europe in the west and from Fennoscandia in the north to the northern Mediterranean in the south. It has also been introduced into British Columbia. The prefer habitats of woodland, scrub, parks and rural gardens.

Mating This moth has one generation per year. They can be seen flying from July and October and presumably mate during this time.

Predators This species is nocturnal and presumably majorly preyed on my nighttime predators such as bats. However it does use a form a camouflage as larva. The caterpillars of this species resemble dead twigs. This may also help against daytime predators.

Fun Fact The canary-shouldered thorn is attracted to light.

(Source: Wikipedia, Butterfly Conservation, Moths of Britain)

Moth of the Week

Garden Tiger Moth

Arctia caja

The garden tiger moth or great tiger moth is a moth of the family Erebidae. They were first described in 1758 by Charles Linnaeus. The caterpillars are known as “woolly bears.”

Description The forewings of this moth are brown with white patterning. This white pattern can be missing entirely. The hindwings are orange with black dots which also may vary from moth to moth due to chance and artificial reasons. French entomologist Charles Oberthür discovered about 500 different variation in patterns.

The patterns on the moth’s wings warn predators that they are toxic. The toxin in this species in part contains neurotoxic choline esters which interfere with the acetylcholine receptor.

The head is lined with red over dark brown and has white antennae while the thorax is a matching dark brown. The abdomen matches the hindwings with bright orange fur and black stripes.

Wingspan Range: 45 - 65 mm (1.8 to 2.6 in)

Diet and Habitat This species are called generalists, meaning they eat a wide variety of plants. That are known to eat plants in the Digitalis and Plantago genuses. These plants produce pyrrolizidine alkaloids, a common chemical that causes toxicity in moths. Adult moths eat nectar from flowers and have no observed preference.

They range from the northern United States and Canada to Europe and Northern and Central Asia. In Europe, it goes north until Lapland. They prefer cold, temperate climates and are found in the mountains of Tien Shan (up to an elevation of 3,000 m (9,800 ft)), grasslands, sand dunes, meadows, woodland edges, hedgerows, gardens, and forests. Because this species are generalists in diet, they are not confined to one habitat due to host plant locations.

Mating Females lay around 50 eggs on the underside of host plant leaves. Eggs hatch from August to September when the former generation has died. It has been observed that generations do not overlap.

Predators Adult moths use their wing patterns and colors to warn predators that they are inedible. Their diet allows them to gain toxins including neurotoxic choline esters which interfere with the acetylcholine receptor. The full effects of the toxins are not known. The adults are mostly preyed on by birds and bats. Another way the adults protect themselves from bats is to make noise with their wings which interferes with the bats’ behaviors.

However, several species of endoparasitic flies prey on the species as larva. These include: Carcelia gnava, Carcelia lucorum, Carcelia tibialis, Compsilura concinnata, Exorista fasciatax Exorista grandis, Hubneria affinis, Pales pavida, Thelaira leucozona, Thelaira nigripes, and Thelymorpha marmorata.

The larvas’ defense against outside forces is stinging hairs that cause hives and irritation in mammals, including humans. These hairs are not fatal.

Fun Fact The garden tiger moth has been a protected species since 2007 by the Biodiversity Action Plan in the United Kingdom.

(Source: Wikipedia, Butterfly Conservation, Moth Identification)

Moth of the Week

Dew Moth

Setina irrorella

Photo credit

The dew moth is a part of the family Erebidae. It was first described in 1758 by Carl Linnaeus. It is thought to have gotten its common name from how the moth hangs from a blade of grass or a leaf when resting during the day. This gives it a transparent look.

Description This species’s wings can vary in colour from cream to yellow. The forewing has 3 lines of black dots across it with the hindwing usually having only one black dot. The underside of the forewing is gray with a yellow margin. The body is black with yellow or black legs.

There are many found variations of this moth:

signata Borkh. - the middle rows of spots are connected by streaks

ab. fumosa Sandb. - has brownish ground colour; found in the north, but also found in Germany.

flavicans Bdv. - has brighter deep yellow wings and the apex of the abdomen is yellow; found in the Mediterranean and Anterior Asia.

nickerli Rebel - paler yellow, the forewing slightly dulled with the exception of the clearer yellow inner margin; found in the Alps and Northern Europe.

andereggi H.-Schiff. - has dark veins on the forewings, appearing like rays; found in the high Alps, and in the higher North.

riffelensis Fall. - considerably smaller, the ground colour is slightly dulled, the black vein-streaks are more numerous, especially the costa and median veins strongly sooty black; found in the high Alps, especially abundant above Zermatt.

lata Christ. - larger with broader wings and paler with very few markings, the hindwing often quite without markings; found in Russia over North Siberia to Kamtschatka.

insignata Stgr., - quite similar to the preceding, but with narrower wings. The forewing also with very few dots, and hindwing without any; found in East Siberia.

Wingspan Range: 27 – 33 mm (≈1.06 - 1.30 in)

Forewing Range: 11 – 18 mm (≈0.43 - 0.71 in)

Diet and Habitat The larva of this moth eat only lichen.

This moth is found in the Palearctic region. Its range starts from Ireland, then spreads south through Europe and east to northern and Central Asia. It can be found in countries such as Siberia, Kamchatka, Chukotka, and northern Mongolia. This species can even live in the limestone Alps up to 2,000 meters above sea level. However, it can not be found in the high north and parts of the Mediterranean region.

It prefers to live in mossy and lichen-covered rock corridors, on chalky and sandy areas and steep, rocky sparse grasslands, rocky coasts, shingle beaches, and calcareous grassland inland. It can also be found in bogs, forest meadows, and on heaths.

Mating Depending on location, this moth can be seen from May to July. It presumably mates during this time. Generations per year not listed.

Predators Not listed. However, the adult males fly in the afternoon, at dusk, after dark, and at dawn. The females are largely nocturnal. These moths are presumably preyed on by nighttime predators such as bats.

Fun Fact The dew moth has four subspecies:

Setina irrorella irrorella

Setina irrorella freyeri (Nickerl, 1845)

Setina irrorella insignata (Staudinger, 1881)

Setina irrorella mediterranea (Daniel, 1964)

Additionally, dew moth caterpillars do not cocoon in trees or foliage but rather in between stones or rocks.

(Source: Wikipedia, Butterfly Conservation)