Red Junglefowl

识别特征

The nominate race of red junglefowl has a mix of feather colours, with orange, brown, red, gold, grey, white, olive, and even metallic green plumage. The tail of the male rooster can grow up to 28 centimetres (11 in), and the whole bird may be as long as 70 centimetres (28 in). There are 14 tail feathers. A moult in June changes the bird's plumage to an eclipse pattern, which lasts through October. The male eclipse pattern includes a black feather in the middle of the back and small red-orange plumes spread across the body. Female eclipse plumage is generally indistinguishable from the plumage at other seasons, but the moulting schedule is the same as that of males.<p>Compared to the more familiar domestic chicken, the red junglefowl has a much smaller body mass (around .mw-parser-output .frac{white-space:nowrap}.mw-parser-output .frac .num,.mw-parser-output .frac .den{font-size:80%;line-height:0;vertical-align:super}.mw-parser-output .frac .den{vertical-align:sub}.mw-parser-output .sr-only{border:0;clip:rect(0,0,0,0);clip-path:polygon(0px 0px,0px 0px,0px 0px);height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px}2+1⁄4 lbs (1 kg) in females and 3+1⁄4 lbs (1.5 kg) in males) and is brighter in coloration. Junglefowl are also behaviourally different from domestic chickens, being naturally very shy of humans compared to the much tamer domesticated subspecies.<p>Male junglefowl are significantly larger than females and have brightly coloured decorative feathers. The male's tail is composed of long, arching feathers that initially look black, but shimmer with blue, purple, and green in direct light. He also has long, golden hackle feathers on his neck and his back. The female's plumage is typical of this family of birds in being cryptic and adapted for camouflage. She alone looks after the eggs and chicks. She also has a very small comb and wattles (fleshy ornaments on the head that signal good health to rivals and potential mates) compared to the males.<p>During their mating season, the male birds announce their presence with the well-known "cock-a-doodle-doo" call or crowing. Within flocks, only dominant males crow. Male red junglefowl have a shorter crowing sound than domestic roosters; the call cuts off abruptly at the end. This serves both to attract potential mates and to make other male birds in the area aware of the risk of fighting a breeding competitor. A spur on the lower leg just behind and above the foot serves in such fighting. Their call structure is complex and they have distinctive alarm calls for aerial and ground predators to which others react appropriately.

分类信息

The red jungle fowl has 5 recognized subspecies:

学名

Gallus gallus

命名信息

(Linnaeus, 1758)

目

Galliformes

科

Phasianidae

属

Gallus

分布与栖息地

The range of the wild form stretches from India, Nepal and Bangladesh in the west, and eastwards across southern China, to Indochina; south/southeast into Malaysia, Singapore, the Philippines, and Indonesia. Junglefowl/Chickens were one of three main animals (along with domesticated pigs and dogs) carried by early Austronesian peoples from Island Southeast Asia in their voyages to the islands of Oceania in prehistory, starting around 5,000 years BP [citation needed]. Today, their modern descendants are found throughout Micronesia, Melanesia, and Polynesia.<p>Red junglefowl prefer disturbed habitats and edges, both natural and human-created. The forage and thick cover in these sorts of areas are attractive to junglefowl, especially nesting females. Junglefowl use both deforested and regenerating forests, and often are found near human settlements or areas of regrowth from slash-and-burn cultivation. Areas burned to promote bamboo growth also attract junglefowl, with edible bamboo seeds more available. In some areas, red junglefowl are absent from silvicultural and rubber plantations; elsewhere, they will occur in both tea plants and palm oil plantations. In the state of Selangor, Malaysia, palm foliage provides suitable cover; palm nut fruit provides adequate food, as well as insects (and their larvae) within, and adjacent to, the trees.  The palms also offer an array of roost sites, from the low perches (~4 m) favored by females with chicks to the higher perches (up to 12 m) used by other adults.<p>Red junglefowl drink surface water when it is available, but they do not require it.  Birds in North-Central India visit water holes frequently during the dry season, although not all junglefowl on the subcontinent live close enough to water to do so; population densities may thus be lower, where surface water is limited.

迁徙

Resident species

行为

Red junglefowl regularly bathe in dust to keep the right balance of oil in their plumage. The dust absorbs extra oil and subsequently falls off.<p>Flight in these birds is almost purely confined to reaching their roosting areas at sunset in trees or any other high and relatively safe places free from ground predators, and for escape from immediate danger through the day.<p>Dominant male junglefowl appear to defend a territory against other dominant males, and the size of the territories has been inferred based on the proximity of roosts. Beebe concluded that territories were rather small, especially as compared to some of the pheasants with which he was familiar. This was supported by Collias and Collias, who reported that adjacent roost sites can be as close as 100 metres (330 ft). Within flocks, male red junglefowl exhibit dominance hierarchies, and dominant males tend to have larger combs than subordinate males. Red junglefowl typically live in flocks of one to a few males and several females. Males are more likely to occur alone than females.<p>Males make a food-related display called "tidbitting", performed upon finding food in the presence of a female. The display is composed of coaxing, cluck-like calls, and eye-catching bobbing and twitching motions of the head and neck. During the performance, the male repeatedly picks up and drops the food item with his beak. The display usually ends when the hen takes the food item either from the ground or directly from the male's beak. Eventually, they sometimes mate.<p>In many areas, red junglefowl breed during the dry portion of the year, typically winter or spring. This is true in parts of India, Nepal, Thailand, Vietnam, and Laos. However, year-round breeding by red junglefowl has been documented in palm oil plantations in Malaysia and also may occur elsewhere. During the laying period, red junglefowl females lay an egg every day. Eggs take 21 days to develop. Chicks fledge in about 4 to 5 weeks, and at 12 weeks old they are chased out of the group by their mother — at which point they start a new group or join an existing one. Sexual maturity is reached at 5 months, with females taking slightly longer than males to reach maturity.<p>Dominant males attempt to maintain exclusive reproductive access to females, though females choose to mate with subordinate males about 40% of the time in a free-ranging feral flock in San Diego, California.<p>Red junglefowl are attracted to areas with ripe fruit or seeds, including fruit plantations, fields of domestic grain, and stands of bamboo. Although junglefowl typically eat fallen fruits and seeds on the ground, they occasionally forage in trees by perching on branches and feeding on hanging fruit. Fruits and seeds of scores of plant species have been identified from junglefowl crops, along with grasses, leaves, roots, and tubers. In addition, red junglefowl capture a wide variety of arthropods, other invertebrates, and vertebrates such as small lizards. Even mammalian faeces may be consumed. Many of these items are taken opportunistically as the birds forage, although some arthropods, such as termites, are taken in large quantities; about 1,000 individual termites have been found in a single crop. Plant materials constitute a higher proportion of the diet of adult red junglefowl than do arthropods and other animals. In contrast, chicks eat mostly adult and larval insects, earthworms, and only occasional plant material.

保护状况

Wild-type red junglefowl are thought to be facing threats due to hybridisation at forest edges, where domesticated free-ranging chickens are common. Nevertheless, they are classified by the IUCN as a species of least concern.

种群趋势

declining