American snout

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American snout
American Snout.jpg
Status TNC G5.svg
Secure  (NatureServe) [1]
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Nymphalidae
Genus: Libytheana
Species:
L. carinenta
Binomial name
Libytheana carinenta
(Cramer, 1777)
Synonyms

Libytheana bachmaniiKirtland, 1851

The American snout or common snout butterfly (Libytheana carinenta) is a member of the subfamily Libytheinae in the brush-footed butterfly family, Nymphalidae. This species is found in both North and South America. The larval host plants are Celtis species on which the eggs are laid singly. Massive migrations of this species often attract attention in the Texas and Mexican newspapers.

Contents

Description

Snout butterflies have prominent elongated mouthparts (labial palpi) which, in concert with the antennae, give the appearance of the petiole (stem) of a dead leaf. Snouts often take advantage of this superb camouflage by hanging upside down under a twig, making them nearly invisible. Wings are patterned black-brown with white and orange markings. The forewings have a distinctive squared off, hook-like (falcate) tip.

Dorsal view American snout butterfly.jpg
Dorsal view
Side view American Snout - Libytheana carinenta, Merrimac Farm Wildlife Management Area, Nokesville, Virginia.jpg
Side view

The caterpillars appear humpbacked, having a small head, swollen first and second abdominal segments, and a last abdominal segment which is tapered and rounded. They are dark green with yellow stripes along the top and sides of the body, and have two black tubercles on the top of the thorax. Their food is the common hackberry ( Celtis occidentalis ) tree. [3]

Migrations

This species is known to be migratory, and some years the migrations are so huge as to darken the sky in places. Migrations from South Texas northward occur at irregular intervals when southern populations explode, [4] often affecting San Antonio, [5] the Texas Hill Country, [6] and Austin. [7] Other migrations have been observed in Arizona, Kansas, and the Lake Erie Islands. Migrations occur from June through October, and are thought to be triggered by droughts followed by heavy summer rains: the droughts reduce a parasitoid that would otherwise limit butterfly populations, whereas the rains induce the spiny hackberry to grow new leaves which provide food for caterpillars. [8] Furthermore, whereas the droughts send the butterflies into a sort of hibernation, the rains bring them out of it all at once to lay eggs, causing a population explosion. [9] In Texas, years in which migrations were observed include 1921, 1978, [8] 1996, [4] 2018, [9] 2020, [5] and 2022. [10]

Related Research Articles

<span class="mw-page-title-main">Butterfly</span> Group of insects in the order Lepidoptera

Butterflies are winged insects from the lepidopteran suborder Rhopalocera, characterized by large, often brightly coloured wings that often fold together when at rest, and a conspicuous, fluttering flight. The group comprises the superfamilies Hedyloidea and Papilionoidea. The oldest butterfly fossils have been dated to the Paleocene, about 56 million years ago, though they likely originated in the Late Cretaceous, about 101 million years ago.

<span class="mw-page-title-main">Lepidoptera</span> Order of insects including moths and butterflies

Lepidoptera or lepidopterans is an order of winged insects that includes butterflies and moths. About 180,000 species of the Lepidoptera have been described, representing 10% of the total described species of living organisms, making it the second largest insect order with 126 families and 46 superfamilies. and one of the most widespread and widely recognizable insect orders in the world.

<span class="mw-page-title-main">Monarch butterfly</span> Milkweed butterfly in the family Nymphalidae

The monarch butterfly or simply monarch is a milkweed butterfly in the family Nymphalidae. Other common names, depending on region, include milkweed, common tiger, wanderer, and black-veined brown. It is among the most familiar of North American butterflies and an iconic pollinator, although it is not an especially effective pollinator of milkweeds. Its wings feature an easily recognizable black, orange, and white pattern, with a wingspan of 8.9–10.2 cm (3.5–4.0 in). A Müllerian mimic, the viceroy butterfly, is similar in color and pattern, but is markedly smaller and has an extra black stripe across each hindwing.

<span class="mw-page-title-main">Nymphalidae</span> Largest butterfly family

The Nymphalidae are the largest family of butterflies, with more than 6,000 species distributed throughout most of the world. Belonging to the superfamily Papilionoidea, they are usually medium-sized to large butterflies. Most species have a reduced pair of forelegs and many hold their colourful wings flat when resting. They are also called brush-footed butterflies or four-footed butterflies, because they are known to stand on only four legs while the other two are curled up; in some species, these forelegs have a brush-like set of hairs, which gives this family its other common name. Many species are brightly coloured and include popular species such as the emperors, monarch butterfly, admirals, tortoiseshells, and fritillaries. However, the under wings are, in contrast, often dull and in some species look remarkably like dead leaves, or are much paler, producing a cryptic effect that helps the butterflies blend into their surroundings.

<span class="mw-page-title-main">Gulf fritillary</span> Sole species in brush-footed butterfly genus Agraulis

The Gulf fritillary or passion butterfly is a bright orange butterfly in the subfamily Heliconiinae of the family Nymphalidae. That subfamily was formerly set apart as a separate family, the Heliconiidae. The Heliconiinae are "longwing butterflies", which have long, narrow wings compared to other butterflies.

<i>Celtis</i> Genus of flowering plants belonging to the hop and hemp family

Celtis is a genus of about 60–70 species of deciduous trees, commonly known as hackberries or nettle trees, widespread in warm temperate regions of the Northern Hemisphere. The genus is part of the extended Cannabis family (Cannabaceae).

<i>Nymphalis antiopa</i> Species of butterfly

Nymphalis antiopa, known as the mourning cloak in North America and the Camberwell beauty in Britain, is a large butterfly native to Eurasia and North America. The immature form of this species is sometimes known as the spiny elm caterpillar. Other older names for this species include grand surprise and white petticoat. A powerful flier, this species is sometimes found in areas far from its usual range during migration.

<i>Greta oto</i> Species of butterfly

Greta oto is a species of brush-footed butterfly and member of the subfamily Danainae, tribe Ithomiini, and subtribe Godyridina. It is known by the common name glasswing butterfly for its transparent wings, which allow it to camouflage without extensive coloration. In Spanish-speaking regions, it may also be referred to as espejitos, meaning "little mirrors" because of its transparent wings. The butterfly is mainly found in Central and northern regions of South America, with sightings as far north as Texas and as far south as Chile. While its wings appear delicate, the butterfly is able to carry up to 40 times its own weight. In addition to its wing physiology, the butterfly is known for behaviors such as long migrations and lekking. Greta oto closely resembles Greta andromica.

<i>Celtis laevigata</i> Species of tree

Celtis laevigata is a medium-sized tree native to North America. Common names include sugarberry, southern hackberry, or in the southern U.S. sugar hackberry or just hackberry.

<i>Libytheana</i> Genus of brush-footed butterflies

Libytheana is a genus of nymphalid butterflies in the snout butterfly subfamily, Libytheinae.

<i>Libythea labdaca</i> Species of butterfly

Libythea labdaca, the African snout butterfly, is a member of the butterfly subfamily Libytheinae found in western and central Africa.

<i>Asterocampa celtis</i> Species of butterfly

Asterocampa celtis, the hackberry emperor, is a North American butterfly that belongs to the brushfooted butterfly family, Nymphalidae. It gets its name from the hackberry tree upon which it lays its eggs. The hackberry tree is the only host plant for A. celtis and is the food source for larvae.

<i>Celtis reticulata</i> Species of tree

Celtis reticulata, with common names including netleaf hackberry, western hackberry, Douglas hackberry, netleaf sugar hackberry, palo blanco, and acibuche, is a small- to medium-sized deciduous tree native to western North America.

<i>Aphrissa statira</i> Species of butterfly

Aphrissa statira, the statira sulphur, is a species of Lepidoptera in the family Pieridae. The species is a medium-sized yellow butterfly, with females more pale than males. They are found from southern regions of Florida and Texas through southern Brazil and northern Argentina. The caterpillars feed on the leaves of several local host plants, while adults prefer to feed on the nectar of red or orange colored flowers. The species is most noted for their dramatic migrations in the tropical areas of the Americas. They have been the subject of many studies about how butterflies navigate and orient during migration.

The Dominican snout is a species of snout butterfly that is endemic to Dominica, an island nation in the Caribbean Lesser Antilles.

Bahía las Palmas is a 19 miles (31 km) bight on the Gulf of California in Baja California Sur, Mexico. Located on the East Cape, it is north of Cabo San Lucas, accessed by Mexican Federal Highway 1.

References

  1. "NatureServe Explorer 2.0 Libytheana carinenta American Snout". explorer.natureserve.org. Retrieved 29 September 2020.
  2. Walker, A. (2020). "Libytheana carinenta". IUCN Red List of Threatened Species . 2020: e.T160608A842729. doi: 10.2305/IUCN.UK.2020-3.RLTS.T160608A842729.en . Retrieved 18 November 2021.
  3. American Snout, Butterflies of Canada
  4. 1 2 "Snout Butterfly". Field Guide to Common Texas Insects. Texas A&M AgriLife Extension. Retrieved 2020-10-02.
  5. 1 2 Kirkpatrick, Brian (2020-09-29). "The Butterflies Are Back: Snout-Nosed Insects Invade San Antonio Once Again". Texas Public Radio. Retrieved 2020-10-02.
  6. Burgess, Cary (2020-09-28). "Butterfly invasion due to migration and strong cold front". Kerrville Daily Times. Retrieved 2020-10-02.
  7. Perez, Pattrick (2020-10-01). "Seeing more butterflies? Here's why". KVUE. Retrieved 2020-10-02.
  8. 1 2 Quinn, Mike (2009-10-12). "Snout Butterfly". American Snout. Texas Entomology. Retrieved 2020-10-02.
  9. 1 2 Maeckle, Monika (2018-08-03). "Snout Butterfly". Snout-nosed butterfly population surges in South Texas following recent rains. Texas Butterfly Ranch. Retrieved 2020-10-02.
  10. "Butterfly swarms are invading Central Texas; they're not the usual butterflies". KXAN Austin. Retrieved 2022-10-04.