The term big cat, while not a biological classification, is used informally to distinguish the larger felid species from smaller ones. One definition of "big cat" includes five members of the genus Panthera: the tiger, lion, jaguar, leopard, and snow leopard. Members of this genus are the only cats able to roar. Despite enormous differences in size, the various species of cat are quite similar in both structure and behaviour, with the exception of the cheetah, which is significantly different from any of the big or small cats. All cats are carnivores and efficient apex predators.

Following bigcats are present in Machia Biological Park:

Asiatic Lion:: The Asiatic lion was once widespread throughout Southwest Asia. Today the species only found in a single location in the wild, the Gir forest (Gujarat) in India. The Asiatic Lions are lazy and indolent creatures that prey on the Sambhar, Chital, Nilgai, Wild Pig, and occasionally on livestock population too. Lion males often live in pairs that last a lifetime. However, in the pride it is the females who go out for hunting in packs and bring back prey, which is first devoured by the male, and only then by the rest of the pride. Males have bunch of hair around the face, called as mane which is not found in females. Tiger::The most charismatic animal of India, the majestic Tiger has an ochre coat patterned with broad black stripes. With black ears each with winking white spot on the back, Tiger is considered as the most powerful animal in wild and is often called as pulse of Indian jungles.

Common Leopard:: Common leopard is having deep yellow coat marked with black rosettes is most adaptable big cat of the Indian Subcontinent. With a spotted head and powerful jaws it mainly feeds on small animals including deer, goats and even stray dogs. An elusive cat, it is well known for its straying in human habitations.

Deer:: Deer seems to be an awesome creature, one that is friendly, shy and simply lovely. It is a kind of animal that neither bothers anyone nor likes to be bothered by any other animal. Deer animal has long legs and a beautiful body. They are found everywhere across the India.