Chital (spotted deer), Ranthambore, India

The chital or cheetal (Axis axis), also known as chital deer, spotted deer or axis deer is a deer which commonly inhabits wooded regions of India, Sri Lanka, Nepal, Bangladesh, Bhutan, and in small numbers in Pakistan. The chital goes by various names in India, among which include: Chital horin in Bengali, Thith Muwa in Sinhalese, Jinke in Kannada, Pulli Maan in Tamil and Malayalam, Duppi in Telugu, Phutuki Horin in Assamese, Haran/Harin in Marathi, and Hiran in Hindi/Urdu (the latter two derived from Harini, the Sanskrit cognate for 'deer'). It is the most common deer species in Indian forests. The name Chital comes from the Bengali word Chitral (চিত্রল)/Chitra (চিত্রা), which means "spotted". The chital is monotypic within the genus Axis, but this genus has also included three species that now are placed in Hyelaphus based on genetic evidence.

Ranthambore National Park or Ranthambhore is one of the largest national parks in northern India. It is situated in Sawai Madhopur district of southeastern Rajasthan, about 110 km north east of Kota and 130 km south east of Jaipur, which is also the nearest airport. The nearest town and railway station is at Sawai Madhopur, about 11 km away; Kota is another convenient station as many trains stop there. RIDCOR operates a mega highway between Kota and Ranthambhore.

Ranthambhore was established as the Sawai Madhopur Game Sanctuary in 1955 by the Government of India, and was declared one of the Project Tiger reserves in 1973. Ranthambore became a national park in 1980. In 1984, the adjacent forests were declared the Sawai Man Singh Sanctuary and Keladevi Sanctuary, and in 1991 the tiger reserve was enlarged to include the Sawai Man Singh and Keladevi sanctuaries.

Ranthambore wildlife sanctuary is known for its tigers and is one of the best places in India to see these majestic predators in the jungle. Tigers can be easily spotted even during the day time. A good time to visit Ranthambore National Park is in November and May when the nature of the dry deciduous forests makes sightings common. Its deciduous forests were once a part of the magnificent jungles of Central India.

Deer (singular and plural) are the ruminant mammals forming the family Cervidae. Species in the Cervidae family include white-tailed deer, mule deer such as black-tailed deer, elk, moose, red deer, reindeer (caribou), fallow deer, roe deer and chital. Male deer of all species (except the Chinese water deer) and also female reindeer grow and shed new antlers each year. In this they differ from permanently horned animals such as antelope; these are in the same order as deer and may bear a superficial resemblance. The musk deer of Asia and water chevrotain (or mouse deer) of tropical African and Asian forests are not usually regarded as true deer and form their own families, Moschidae and Tragulidae, respectively.

A herd refers to a social grouping of certain animals of the same species, either wild or domestic, and also to the form of collective animal behavior associated with this (referred to as herding) or as a verb, to herd, to its control by another species such as humans or dogs.

The term herd is generally applied to mammals, and most particularly to the grazing ungulates that classically display this behaviour. Different terms are used for similar groupings in other species; in the case of birds, for example, the word is flocking, but flock may also be used, in certain instances, for mammals, particularly sheep or goats. A group of quail is often referred to as a covey. Large groups of carnivores are usually called packs, and in nature a herd is classically subject to predation from pack hunters.

Special collective nouns may be used for particular taxa (for example a flock of geese, if not in flight, is sometimes called a gaggle) but for theoretical discussions of behavioural ecology, the generic term herd can be used for all such kinds of assemblage.^{[citation needed]}

The even-toed ungulates (Artiodactyla) are ungulates (hoofed animals) whose weight is borne about equally by the third and fourth toes, rather than mostly or entirely by the third as in odd-toed ungulates (perissodactyls), such as horses.

Artiodactyla comes from (Greek: ἄρτιος (ártios), "even", and δάκτυλος (dáktylos), "finger/toe"), so the name "even-toed" is a translation of the description. This group includes pigs, peccaries, hippopotamuses, camels, llamas, chevrotains (mouse deer), deer, giraffes, pronghorn, antelopes, sheep, goats, and cattle. The group excludes whales (Cetacea) even though DNA sequence data indicate that they share a common ancestor, making the group paraphyletic. The phylogenetically accurate group is Cetartiodactyla (from Cetacea + Artiodactyla).

There are about 220 artiodactyl species, including many that are of great nutritional, economic, and cultural importance to humans.

A further distinguishing feature of the group is the shape of the astragalus (talus), a bone in the ankle joint, which has a double-pulley structure. This gives the foot greater flexibility.

Ruminantia includes many of the well-known large grazing or browsing mammals: among them cattle, goats, sheep, deer, and antelope. All members of the Ruminantia are ruminants: they digest food in two steps, chewing and swallowing in the normal way to begin with, and then regurgitating the semi-digested cud to re-chew it and thus extract the maximum possible food value.

Not all ruminants belong to the Ruminantia. Camels and llamas are among the exceptions, a suborder known as Tylopoda. Also, there are a number of other large grazing mammals that, while not strictly ruminants, have similar adaptations for surviving on large quantities of low-grade food. Kangaroos and horses are examples.

Ruminantiamorpha is a total clade of artiodactyls defined, according to Spaulding et al., as "Ruminantia plus all extinct taxa more closely related to extant members of Ruminantia than to any other living species." Spaulding grouped some genera of the family Anthracotheriidae as within Ruminantiamorpha but not Ruminantia, but placed other anthracotheres within Ruminantiamorpha's sister clade, Cetancodontamorpha.

The Tragulidae are the basal family in the Ruminantia.

The ancestral Ruminantia karyotype is 2n = 48 similar to that of cetartiodactyls.