Corbett National Park has more than 50 species of mammals, 585 species of birds and 25 species of reptiles, but the Park is known for its elephants and leopards, not its tigers. Many kinds of deer, namely chital (spotted deer), sambar (Indian stag), chinkara (Indian gazelle), pada (hog deer) and muntjac (barking deer) abound in the Park. Tiger sighting is rare, in spite of a lot of alarm calls from monkeys and deer. Elephant herds comprising tuskers, females and calves are commonly seen. However, an elephant herd with calves is perhaps the most dangerous encounter in the wild, for elephants are very possessive of their young and do not hesitate to charge at intruding human beings. Leopard sighting is even rarer than that of the tiger, and these spotted cats confine themselves to the higher reaches of the Park. Other feline species found in the Park are leopard cats, jungle cats, the rare fishing cat, and caracal, to name a few. Sloth bears, wild boars, monkeys, dholes (wild dogs), jackals and ghorals (mountain goats) also inhabit the Park. The aquatic reptile population in the Park consists of mugger (Crocodylus palustris) and gharial (Gavialis gangeticus) crocodiles, while Indian rock pythons, Russell's vipers, cobras, king cobras and common kraits are some of the snakes found in the Park. Bird life includes parakeets, flycatchers, babblers, cuckoos, robins, bulbuls, Indian and Great Pied hornbills, warblers and finches, to name a few.
The best visiting season of Corbett is from November 15 to June 15. Corbett remains closed between June 16 and November 14, when the monsoons flood the river beds and cut the fragile road links.