Bibasis sena
Encyclopedia
Bibasis sena, commonly known as the Orange-tailed Awl, is a butterfly
Butterfly
A butterfly is a mainly day-flying insect of the order Lepidoptera, which includes the butterflies and moths. Like other holometabolous insects, the butterfly's life cycle consists of four parts: egg, larva, pupa and adult. Most species are diurnal. Butterflies have large, often brightly coloured...

 belonging to the family Hesperiidae. It is also sometimes called the Pale Green Awlet though the latter name properly refers to Bibasis gomata
Bibasis gomata
Bibasis gomata, commonly known as the Pale Green Awlet, is a butterfly belonging to the family Hesperiidae. It is found in Northeast India, the Western Ghats and parts of Southeast Asia...

.

Distribution

The skipper is found in Sri Lanka
Sri Lanka
Sri Lanka, officially the Democratic Socialist Republic of Sri Lanka is a country off the southern coast of the Indian subcontinent. Known until 1972 as Ceylon , Sri Lanka is an island surrounded by the Indian Ocean, the Gulf of Mannar and the Palk Strait, and lies in the vicinity of India and the...

, India
India
India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

, Myanmar
Myanmar
Burma , officially the Republic of the Union of Myanmar , is a country in Southeast Asia. Burma is bordered by China on the northeast, Laos on the east, Thailand on the southeast, Bangladesh on the west, India on the northwest, the Bay of Bengal to the southwest, and the Andaman Sea on the south....

, Thailand
Thailand
Thailand , officially the Kingdom of Thailand , formerly known as Siam , is a country located at the centre of the Indochina peninsula and Southeast Asia. It is bordered to the north by Burma and Laos, to the east by Laos and Cambodia, to the south by the Gulf of Thailand and Malaysia, and to the...

, Laos
Laos
Laos Lao: ສາທາລະນະລັດ ປະຊາທິປະໄຕ ປະຊາຊົນລາວ Sathalanalat Paxathipatai Paxaxon Lao, officially the Lao People's Democratic Republic, is a landlocked country in Southeast Asia, bordered by Burma and China to the northwest, Vietnam to the east, Cambodia to the south and Thailand to the west...

, south Vietnam
Vietnam
Vietnam – sometimes spelled Viet Nam , officially the Socialist Republic of Vietnam – is the easternmost country on the Indochina Peninsula in Southeast Asia. It is bordered by China to the north, Laos to the northwest, Cambodia to the southwest, and the South China Sea –...

, Hainan
Hainan
Hainan is the smallest province of the People's Republic of China . Although the province comprises some two hundred islands scattered among three archipelagos off the southern coast, of its land mass is Hainan Island , from which the province takes its name...

, Malay peninsula, Indonesia
Indonesia
Indonesia , officially the Republic of Indonesia , is a country in Southeast Asia and Oceania. Indonesia is an archipelago comprising approximately 13,000 islands. It has 33 provinces with over 238 million people, and is the world's fourth most populous country. Indonesia is a republic, with an...

n archipelago (including Borneo
Borneo
Borneo is the third largest island in the world and is located north of Java Island, Indonesia, at the geographic centre of Maritime Southeast Asia....

, Java
Java
Java is an island of Indonesia. With a population of 135 million , it is the world's most populous island, and one of the most densely populated regions in the world. It is home to 60% of Indonesia's population. The Indonesian capital city, Jakarta, is in west Java...

, Kangean
Kangean
Kangean may refer to:*Kangean Islands*Kangean Island*Kangean language*1908 meteorite fall, see meteorite falls...

, Bali
Bali
Bali is an Indonesian island located in the westernmost end of the Lesser Sunda Islands, lying between Java to the west and Lombok to the east...

, Lombok
Lombok
Lombok is an island in West Nusa Tenggara province, Indonesia. It forms part of the chain of the Lesser Sunda Islands, with the Lombok Strait separating it from Bali to the west and the Alas Strait between it and Sumbawa to the east...

, Bawean
Bawean
Bawean is an island of Indonesia located approximately 150 km north of Surabaya in the Java Sea, off the coast of Java. It is administered by Gresik Regency of East Java province. It is approximately 15 km in diameter and is circumnavigated by a single narrow road. Bawean is dominated by...

, Sumba
Sumba
Sumba is an island in eastern Indonesia, is one of the Lesser Sunda Islands, and is in the province of East Nusa Tenggara. Sumba has an area of 11,153 km², and the population was officially at 611,422 in 2005...

, Sumbawa
Sumbawa
Sumbawa is an Indonesian island, located in the middle of the Lesser Sunda Islands chain, with Lombok to the west, Flores to the east, and Sumba further to the southeast. It is in the province of West Nusa Tenggara....

) and the Philippines
Philippines
The Philippines , officially known as the Republic of the Philippines , is a country in Southeast Asia in the western Pacific Ocean. To its north across the Luzon Strait lies Taiwan. West across the South China Sea sits Vietnam...

.

In India, the skipper is found in the Western Ghats
Western Ghats
The Western Ghats, Western Ghauts or the Sahyādri is a mountain range along the western side of India. It runs north to south along the western edge of the Deccan Plateau, and separates the plateau from a narrow coastal plain along the Arabian Sea. The Western Ghats block rainfall to the Deccan...

 including the Nilgiris
Nilgiris (mountains)
The Nilgiri , often referred to as the Nilgiri Hills, are a range of mountains with at least 24 peaks above , in the westernmost part of Tamil Nadu state at the junction of Karnataka and Kerala states in Southern India...

, Kodagu
Kodagu
Kodagu , also known by its anglicised former name of Coorg, is an administrative district in Karnataka, India. It occupies an area of in the Western Ghats of southwestern Karnataka. As of 2001, the population was 548,561, 13.74% of which resided in the district's urban centres, making it the least...

, Kanara
Kanara
The Kanara or Canara region comprises three coastal districts of Karnataka, namely Dakshina Kannada, Udupi and Uttara Kannada and Kasaragod district of Kerala in southwestern India. Kanara forms the southern part of the Konkan coast...

, and the Himalayas
Himalayas
The Himalaya Range or Himalaya Mountains Sanskrit: Devanagari: हिमालय, literally "abode of snow"), usually called the Himalayas or Himalaya for short, is a mountain range in Asia, separating the Indian subcontinent from the Tibetan Plateau...

, from Shimla
Shimla
Shimla , formerly known as Simla, is the capital city of Himachal Pradesh. In 1864, Shimla was declared the summer capital of the British Raj in India. A popular tourist destination, Shimla is often referred to as the "Queen of Hills," a term coined by the British...

 eastward to Northeast India and onto Myanmar
Myanmar
Burma , officially the Republic of the Union of Myanmar , is a country in Southeast Asia. Burma is bordered by China on the northeast, Laos on the east, Thailand on the southeast, Bangladesh on the west, India on the northwest, the Bay of Bengal to the southwest, and the Andaman Sea on the south....

 (recorded in the Karens and Dawnas).

The type locality for this species is Bengal
Bengal
Bengal is a historical and geographical region in the northeast region of the Indian Subcontinent at the apex of the Bay of Bengal. Today, it is mainly divided between the sovereign land of People's Republic of Bangladesh and the Indian state of West Bengal, although some regions of the previous...

.

Status

Evans (1932) records the Orange-tail Awl as 'Rare' in India and 'Very Rare' in the Andaman islands. He records the butterfly as 'Not Rare' in South Myanmar, the Malay peninsula and parts of the Indonesian archipelago.

Description

See glossary
Glossary of Lepidopteran terms
This glossary describes the terms used in the formal descriptions of insect species, jargon used mostly by professionals or entomologist....

 for terms used.

Both sexes: The butterfly has a wingspan of 45 to 50 mm. Above, both sexes are an unblemished dark-brown. The hindwing has an orange fringe.The abdomen is orange towards the rear of the butterfly. Below, the wings have white patches; the forewing having a large white central patch, and the hindwing having a broad pure white discal band.

The male has no brands.

Detailed description

Watson (1891) gives a detailed description as follows:-
Male. Upperside dark chocolate brown. Cilia of hindwing carmine-red. Underside maroon brown ; forewing with a large buff-white patch from the middle of posterior margin, bordered above with purple ; hindwing with a broad transverse purple white band terminating before the anal angle, the inner border of which is sharply defined, the outer suffusing itself on the disk. Cilia carmine-red. Palpi and thorax in front, beneath and anal tuft dull yellow. Thorax beneath greyish brown.
The female is described by Mr. Moore
Frederic Moore
Frederic Moore FZS was a British entomologist. It has been said that Moore was born at 33 Bruton Street but may be incorrect given that this was the address of the menagerie and office of the Zoological Society of London from 1826 to 1836.Moore was appointed an assistant in the East India Company...

 in his "Lepidoptera of Ceylon" as not differing from the male.

Taxonomy

The skipper has the following subspecies:
  • B. sena sena (Moore
    Frederic Moore
    Frederic Moore FZS was a British entomologist. It has been said that Moore was born at 33 Bruton Street but may be incorrect given that this was the address of the menagerie and office of the Zoological Society of London from 1826 to 1836.Moore was appointed an assistant in the East India Company...

    , 1865) - Type locality: Bengal. Distribution: Sri Lanka, S.India - Burma, Thailand, Laos, Hainan, Andamans.
  • B. sena uniformis Elwes
    Henry John Elwes
    Henry John Elwes, FRS was a British botanist, entomologist, author, lepidopterist, naturalist, collector and traveller who became renowned for collecting specimens of lilies during trips to the Himalayas and Korea. He was the first person to receive the Victoria Medal of the Royal Horticultural...

     & Edwards 1897 - Type locality: Java. Distribution: Burma, Thailand, Malay Peninsula, Borneo, Java, Kangean, Bali, Lombok, Bawean, Sumba, Sumbawa.
  • B. sena palawan (Staudinger, 1889) - Type locality: Palawan. Distribution: Calamian Islands, Cebu, Homonhon, Leyte, Luzon, Marinduque, Mindanao, Negros, Palawan, Panay, Polillo, Sibutu, Sibuyan, Tawitawi.

Habits

Diurnal. The butterfly is confined to heavy jungle of low elevations, typically up to 4000 to 5000 ft. The male can be seen in the early mornings, basking on the top of leaves in forest glades and hilltops, chasing off intruders. The typical resting position of the Orange-tail Awl is the underside of the leaf. He does not mud-puddle or visit flowers. The female is usually found close to the host-plants.

Life cycle

The larva has been recorded on Combretum latifolium and Combretum extensum in Kanara.
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