The Burmese hare (Lepus peguensis), also known as the Siamese hare, is a species of medium-sized hare found in Cambodia, Laos, Myanmar, Thailand, and Vietnam. It is typically found in forest clearings, croplands, wastelands, and sandy areas along coasts and rivers. Some populations have been found in the mountains of Thailand, though it is more often found at lower elevations below . The burmese hare's closest relative is the Hainan hare, though it is more similar in appearance to the Indian hare.
The Burmese hare is identifiable by its reddish-grey body and white underbody fur. It is distinguished from the similar-looking Indian hare by its tail, which is black on top. The Burmese hare is most active during night and at twilight, and is both herbivorous and territorial. It reproduces several times a year, with each litter yielding one to seven young. The hares live up to six years on average. Though hunting and expanding rice farming threaten Burmese hare populations, the species is generally common throughout its wide distribution. Some populations are thought to be increasing in size due to logging operations creating favourable hare habitats. The International Union for Conservation of Nature considers it to be a least-concern species.
The English zoologist Edward Blyth described the Burmese hare, Lepus peguensis, in 1855. The specimen he described was a skin sent from the Bago Region (then known as Pegu) in Myanmar by Major Arthur Purves Phayre. Blyth thus gave it the species name peguensis after the region it was found in. The skin was suspected to belong to the Chinese hare (Lepus sinensis); Blyth noted its similarity to the Indian hare (Lepus nigricollis) but distinguished it based on its white underparts and black upper tail. The Hainan hare (L. hainanus) was considered synonymous with the Burmese hare from 1955 up until 2005. The genetic differences and similarities between the two species have yet to be clarified; differentiation has been reliant on analysis of the species' mitochondrial DNA.
Two subspecies are recognised:
The subspecies Lepus peguensis siamensis is a synonym of the nominate subspecies L. p. peguensis, but since 2016 has been under consideration to be separated out as a unique species. The differences between Burmese hare subspecies have been described as clinal and potentially "arbitrary and unreasonable".
The closest relatives to the Burmese hare are the Hainan hare and the Indian hare. These three species form a clade that is sister to a group made up of the European hare (Lepus europaeus), Abyssinian hare (Lepus habessinicus), and Granada hare (Lepus granatensis):
The Burmese hare is a medium-sized species that closely resembles the Indian hare (L. nigricollis). Adults grow to a length of and weigh between . The hare's body measures from in length, not including a tail. The hind feet measure from , and the ears are fairly large, measuring from in length. The long ears have black tips, the dorsal surface of the body is reddish-grey tinged with black, the rump is more grey and the underparts are white. The tail is white above and black below. In Myanmar, the hare's feet are white, while they are more reddish- or yellowish-brown in specimens from Thailand.
Like other hares and rabbits, it has a dental formula of , indicating that it has two pairs of upper and one pair of lower incisors, no canines, three upper and two lower premolars on each side, and three upper and lower molars on either side of the jaw.
The range of the Burmese hare extends from southern Myanmar, south of the Chindwin River, to northern parts of the Malay Peninsula, including Thailand, Cambodia, southern Laos and southern Vietnam. The subspecies L. p. peguensis has been described as occupying the valleys of the Irrawaddy, Chindwin, and Salween rivers, from the 22nd parallel north down to Yangon. Its range also includes the cleared forests of Thailand and southern parts of the Malay Peninsula down to the 12th parallel north. L. p. vassali is found within Cambodia, Laos, and southern Vietnam.
The Burmese hare is mainly a lowland species, but has been recorded as high as in the mountains of Thailand although other surveys have not found it higher than elsewhere. Its typical habitats are cropland and dry wasteland, clearings in forests and coastal sandy areas. It is common in seasonally-inundated riverside flats, and is present in rice fields cultivated in a traditional manner while avoiding heavily irrigated, intensively-grown paddies.
The Burmese hare is a nocturnal and crepuscular species. It feeds on grass, twigs and bark. It is territorial.
Several litters of one to seven young are born each year. The young are altricial, being born with open eyes and completely furred. The hare's gestation period lasts 35 to 40 days. During the breeding season, aggression between individuals increases dramatically; biting, forelimb boxing, and hind limb kicking is reported. Its average lifespan is estimated to be six years.
Threats faced by the Burmese hare include the increased cultivation of irrigated rice paddies, which results in unsuitable habitat, and being hunted extensively for food. In Laos and Vietnam, the hare's habitat is often burned during the dry season from February to May. However, the hare has a wide distribution and is common within its range. Burning of its habitat may only pose a threat to younger members of the species. Its population is stable, or even possibly increasing in places where logging results in favourable scrubby habitat. The International Union for Conservation of Nature lists it as a least concern species.