The Bengal florican (''Houbaropsis bengalensis''), also called the Bengal bustard, is a bustard

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

native to the

Indian subcontinent The Indian subcontinent is a physiographic region of Asia below the Himalayas which projects into the Indian Ocean between the Bay of Bengal to the east and the Arabian Sea to the west. It is now divided between Bangladesh, India, and Pakista ...

Cambodia Cambodia, officially the Kingdom of Cambodia, is a country in Southeast Asia on the Mainland Southeast Asia, Indochinese Peninsula. It is bordered by Thailand to the northwest, Laos to the north, and Vietnam to the east, and has a coastline ...

, and

Vietnam Vietnam, officially the Socialist Republic of Vietnam (SRV), is a country at the eastern edge of mainland Southeast Asia, with an area of about and a population of over 100 million, making it the world's List of countries and depende ...

. It is listed as

Critically Endangered An IUCN Red List critically endangered (CR or sometimes CE) species is one that has been categorized by the International Union for Conservation of Nature as facing an extremely high risk of extinction in the wild. As of December 2023, of t ...

on the

IUCN Red List The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is an inventory of the global conservation status and extinction risk of biological ...

because fewer than 1,000 individuals were estimated to be alive as of 2017. It is the only member of the

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

''Houbaropsis''.

Description

The male Bengal florican has a black

plumage Plumage () is a layer of feathers that covers a bird and the pattern, colour, and arrangement of those feathers. The pattern and colours of plumage differ between species and subspecies and may vary with age classes. Within species, there can b ...

from the head and neck to underparts. Its head carries a long lanky crest, and the neck has elongated display plumes. The upperside is buff with fine black vermiculations and black arrowhead markings, and there is a conspicuous large white patch from the wing coverts to the

remiges Flight feathers (''Pennae volatus'') are the long, stiff, asymmetrically shaped, but symmetrically paired pennaceous feathers on the wings or tail of a bird; those on the wings are called remiges (), singular remex (), while those on the ta ...

. In flight, the male's wings appear entirely white except for the dark primary remiges. The feet and legs are yellow, the bill and irides are dark. The female is buff-brown similar to the males' back with a dark brown crown and narrow dark streaks down the side of the neck. Her wing coverts are lighter than the remiges and covered in fine dark barring. Immature Bengal floricans look like a female. Adult Bengal floricans range from in length and stand around tall. The female is larger than the male and weighs around against a weight of in males. They are normally silent but, when disturbed, utter a metallic ''chik-chik-chik'' call. Displaying males croak and produce a deep humming sound. The only bird even remotely similar to adult males of the Bengal florican is the lesser florican (''Sypheotides indica''). This is a smaller, slimmer-necked bustard overall, and its males have cheek-tufts of plumes with pennant-like tips rather than the crest, and a white band between neck and back. The females are similar, and young Bengal floricans can be easily mistaken for female lesser floricans. The latter has almost white wing coverts however, resembling the males' wing patch. Bengal florican (Houbaropsis bengalensis blandini) male in flight Tonle Sap.jpg, male ''H.b. blandini''

Tonlé Sap Tonlé Sap (; , ; or commonly translated as 'Great Lake') is a lake in the northwest of Cambodia. Belonging to the Mekong, Mekong River system, Tonlé Sap is the largest freshwater lake in Southeast Asia and one of the most diverse and prod ...

Bengal Florican. AMSM2805.jpg, female

Manas National Park Manas National Park is a national park, Project Tiger reserve, and an elephant reserve in Assam, India. Located in the Himalayan foothills, it borders the Royal Manas National Park in Bhutan. The park is known for its rare and endangered ende ...

Assam Assam (, , ) is a state in Northeast India, northeastern India, south of the eastern Himalayas along the Brahmaputra Valley, Brahmaputra and Barak River valleys. Assam covers an area of . It is the second largest state in Northeast India, nor ...

, India

Distribution and habitat

The Bengal florican has two disjunct populations. One occurs from

Uttar Pradesh Uttar Pradesh ( ; UP) is a States and union territories of India, state in North India, northern India. With over 241 million inhabitants, it is the List of states and union territories of India by population, most populated state in In ...

through the

Terai The Terai or Tarai is a lowland region in parts of southern Nepal and northern India that lies to the south of the outer foothills of the Himalayas, the Sivalik Hills and north of the Indo-Gangetic Plain. This lowland belt is characterised by ...

Nepal Nepal, officially the Federal Democratic Republic of Nepal, is a landlocked country in South Asia. It is mainly situated in the Himalayas, but also includes parts of the Indo-Gangetic Plain. It borders the Tibet Autonomous Region of China Ch ...

and

Arunachal Pradesh Arunachal Pradesh (; ) is a States and union territories of India, state in northeast India. It was formed from the North-East Frontier Agency (NEFA) region, and India declared it as a state on 20 February 1987. Itanagar is its capital and la ...

in India, and historically to

Bangladesh Bangladesh, officially the People's Republic of Bangladesh, is a country in South Asia. It is the List of countries and dependencies by population, eighth-most populous country in the world and among the List of countries and dependencies by ...

. The other occurs in

and perhaps adjacent southern

. It is mostly resident on its breeding grounds; around

in Cambodia however, the birds use

grasslands A grassland is an area where the vegetation is dominated by grasses (Poaceae). However, sedge ( Cyperaceae) and rush ( Juncaceae) can also be found along with variable proportions of legumes such as clover, and other herbs. Grasslands occur ...

near the lake to breed, and move away from the water in the

wet season The wet season (sometimes called the rainy season or monsoon season) is the time of year when most of a region's average annual rainfall occurs. Generally, the season lasts at least one month. The term ''green season'' is also sometimes used a ...

when the breeding grounds are flooded. Similarly, the Terai population seems to move to warmer lowland locations in winter. Migrations are not long-distance, however, and probably are restricted to a few dozen kilometers. Bengal floricans live in open tall grassland habitats with scattered bushes. The most important grass species are satintails ''Imperata'', in particular Cogongrass ''I. cylindrica''),

sugarcane Sugarcane or sugar cane is a species of tall, Perennial plant, perennial grass (in the genus ''Saccharum'', tribe Andropogoneae) that is used for sugar Sugar industry, production. The plants are 2–6 m (6–20 ft) tall with stout, jointed, fib ...

(''Saccharum'', in particular Kans Grass ''S. spontaneum''), munj grass ('' Tripidium bengalense''), as well as ''

Desmostachya bipinnata ''Desmostachya bipinnata'', commonly known as halfa grass, big cordgrass, and salt reed-grass, is an Old World perennial grass, long known and used in human history. The grass is tall, tufted, leafy, perennial grass, branching from the base, erec ...

''. The birds are usually encountered in the early mornings and evenings and are most easily spotted in the breeding season from March to August, which is when most censuses of the population are conducted. Particular between March and May, when they give their stunning

courtship display A courtship display is a set of display behaviors in which an animal, usually a male, attempts to attract a mate; the mate exercises choice, so sexual selection acts on the display. These behaviors often include ritualized movement ("dances"), ...

, males are far more conspicuous than the cryptically-coloured females, which moreover prefer high grassland rich in sugarcane.

Status and conservation

Restricted to tiny fragments of grassland scattered across South and Southeast Asia, the Bengal florican is the world's rarest bustard. It is known to have become increasingly threatened by land conversion for intensive agriculture, particularly for dry season

rice Rice is a cereal grain and in its Domestication, domesticated form is the staple food of over half of the world's population, particularly in Asia and Africa. Rice is the seed of the grass species ''Oryza sativa'' (Asian rice)—or, much l ...

production.

Poaching Poaching is the illegal hunting or capturing of wild animals, usually associated with land use rights. Poaching was once performed by impoverished peasants for subsistence purposes and to supplement meager diets. It was set against the huntin ...

continues to be a problem in Southeast Asia, while the South Asian population is down to less than 350 adult birds, about 85% of which are found in India. Though more threatened, birds in Southeast Asia may number as many as in South Asia but more probably closer to or even less than 1,000 adults.

India

The population has decreased dramatically in past decades. It may be that in India the decline is coming to a halt and that stocks in Dibru-Saikhowa and

Kaziranga National Park Kaziranga National Park is a List of national parks of India, national park in the Golaghat district, Golaghat, Sonitpur district, Sonitpur, Biswanath district, Biswanath and Nagaon district, Nagaon districts of the state of Assam, Assam, India. ...

s and Dudhwa Tiger Reserve are safe at very low levels. Still, its global status is precarious and it was consequently uplisted from

Endangered An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching, inv ...

in the 2007

Cambodia

, it is mostly found in Kampong Thom Province; lesser numbers are found in Siem Reap Province and remnants might persist in Banteay Meanchey,

Battambang Battambang (, Romanization of Khmer#UNGEGN, UNGEGN: ) is the capital of Battambang province and the List of cities and towns in Cambodia, third largest city in Cambodia. The city is situated on the Sangkae River, which winds its way through t ...

and Pursat Provinces. Its rate of decline there has accelerated in the early 21st century. The government of Cambodia has taken a significant step towards protecting important habitat for the Bengal florican. Along with 350 square kilometres being designated as "Integrated Farming and Biodiversity Areas", where land-use practices are adapted to also benefit the Bengal florican, a

public education A state school, public school, or government school is a primary school, primary or secondary school that educates all students without charge. They are funded in whole or in part by taxation and operated by the government of the state. State-f ...

program to inform schoolchildren about the bird has also been undertaken. At present, the species may persist in the Ang Trapaing Thmor Crane Sanctuary and perhaps

's Tràm Chim National Park, but the South Asian population is not known with certainty from any

protected area Protected areas or conservation areas are locations which receive protection because of their recognized natural or cultural values. Protected areas are those areas in which human presence or the exploitation of natural resources (e.g. firewood ...

Nepal

, it is essentially restricted to protected areas, namely Shuklaphanta,

Bardia Bardia, also El Burdi or Bardiyah ( or ) is a Mediterranean seaport in the Butnan District of eastern Libya, located near the border with Egypt. It is also occasionally called ''Bórdi Slemán''. The name Bardia is deeply rooted in the ancient ...

and

Chitwan National Park Chitwan National Park is the first national park of Nepal. It was established in 1973 as the Royal Chitwan National Park and was granted the status of a World Heritage Site in 1984. It covers an area of in the Terai of south-central Nepal. It ra ...

s. Since 1982, the Shuklaphanta and Bardia populations appear to have been stable, but the Chitwan population has declined. In 2001, 20–28 birds were estimated in Shuklaphanta, 6–10 birds in Bardia, and 6–22 birds in Chitwan. It has been absent from Koshi Tappu Wildlife Reserve, since 1990, and has not been sighted around the Koshi Barrage since the 1980s. In spring 2007, 8–9 males were recorded in Sukla Phanta and 16–18 birds estimated; one male was sighted in Bardia and 2–4 estimated; five males were sighted in Chitwan and 10–14 estimated. The overall Nepalese population declined by 30% between 2001 and 2007. 17 individuals were recorded along the

Koshi River The Kosi or Koshi is a transboundary river which flows through China, Nepal and India. It drains the northern slopes of the Himalayas in Tibet and the southern slopes in Nepal. From a major confluence of tributaries north of the Chatra Gorge onw ...

in the spring of 2011. The courtship display of males has been discussed by many

naturalist Natural history is a domain of inquiry involving organisms, including animals, fungi, and plants, in their natural environment, leaning more towards observational than experimental methods of study. A person who studies natural history is cal ...

s travelling

British India The provinces of India, earlier presidencies of British India and still earlier, presidency towns, were the administrative divisions of British governance in South Asia. Collectively, they have been called British India. In one form or another ...

, and in the modern era attracts tourists who provide revenue to locals. Studies indicate that the Bengal florican is not a particularly shy or hemerophobic species, its apparent intolerance of human settlements being chiefly due to its intolerance of land clearance for agriculture.

Pasture Pasture (from the Latin ''pastus'', past participle of ''pascere'', "to feed") is land used for grazing. Types of pasture Pasture lands in the narrow sense are enclosed tracts of farmland, grazed by domesticated livestock, such as horses, c ...

s and the traditional use of

common land Common land is collective land (sometimes only open to those whose nation governs the land) in which all persons have certain common rights, such as to allow their livestock to graze upon it, to collect wood, or to cut turf for fuel. A person ...

for villagers' tall-grass harvest (for construction and handicraft) actually seem to be tolerated quite well by the birds.

Woody plant encroachment Woody plant encroachment (also called woody encroachment, bush encroachment, shrub encroachment, shrubification, woody plant proliferation, or bush thickening) is a natural phenomenon characterised by the area expansion and density increase of ...

contributes to habitat loss in countries like Nepal and India. In particular, sal (''Shorea robusta'') and saj (''Terminalia elliptica'') have been identified as trees that encroach upon the florican's habitat in Nepal. If firewood and timber are collected from grassland rather than from forests, such human land use can therefore benefit the species. The species decline in Bardia National Park is probably chiefly due to insufficient use of trees that overgrow grassland. A

sustainable land management Land management is the process of managing the use and development of land resources. Those resources are used for a variety of purposes for example agriculture, forestry, water resource management, human settlements and tourism. One aim of l ...

technique that will bolster Bengal florican stocks consists of harvesting grass and particularly wood from changing tracts of land, leaving some areas unharvested each year and setting aside a few additional ones as reserve land, where grasses can grow tall for years until they are harvested. Controlled burning may be necessary when woodland encroachment is strong; it should take place before March so that the year's offspring are not harmed. A landscape ecology approach, integrating social, biological and physical environmental elements at scales compatible with management objectives, will be needed to effectively conserve Bengal floricans and their grassland habitats.