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.
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.