Kerala is the greenest state of India, and home to 12 Wildlife Sanctuaries and two National Parks.

• Peppara Wildlife sanctuary
• Neyyar Wildlife sanctuary
• Shenduruni Wildlife sanctuary
• Periyar Wildlife sanctuary
• Idduki Wildlife sanctuary
• Chinnar Wildlife sanctuary
• Parambikulam Wildlife sanctuary
• Aralam Wildlife Sanctuary
• Muthanga Wildlife sanctuary
• Kadalundi Bird Sanctuary
• Thattekad Bird Sanctuary
• Kumarakom Bird Sanctuary
• Silent Valley National Park
• Eravikulam National Park

On the upper right there's a map showing all of them.

Kerala is also one of the 13 states where the Project Elephant has been implemented. This is a project launched in 1992 by the Government of India to assist states having free ranging population of wild elephants. and is aimed at ensuring long term survival of identified viable population of elephants in their natural habitats.

Fauna

Main animals found in the sanctuaries of Kerela are:

Elephants, gaur (the Indian bison), sambar, deer, wild dogs, jungle cats, civet cats, tigers, panthers, leopards, wild boars, sloth bears, lion tailed macaques, Malabar giant squirrel, flying squirrel, spotted deer, peacocks, star tortoises, wild dogs, the Atlas moth, mongoose, foxen, bears, barking deer, pangolins, bison etc..

Reptiles such as cobra, viper, krait, a number of non- poisonous snakes, pythons, rat snakes, vine snakes,bicoloured frogs, crocodiles, varanur pond terrapins, cane turtles, star tortoises, geckoes, chameleons, monitor lizards

A birdwatcher's paradise!
And of course, numerous birds:
water fowl, cuckoo, owl, egret, heron, water duck, migratory Siberian duck, jungle fowls, mynas, laughing thrushes, black bulbuls, peafowls, woodpeckers, kingfishers, hornbills, storks, raptors, darters, cormorants, grackles, clusters, Indian rollers, common snipes, crow pheasants, jungle nightjars, kites, black-winged kites, grey-headed fishing eagles, grey drongos, Malabar trogons, large pied wagtails, baya sparrows, grey jungle fowls, Indian hill mynas, robins, jungle babblers, sunbirds, peacocks, crimson-throated barbets, bee-eaters, shrikes, fairy bluebirds, night herons, grey hornbills, Malabar hornbills and more than 253 other species including migrant birds...

Flora

Almost a fourth of India's 10,000 plant species are found in the state.

Among the almost 4,000 flowering plant species (1,272 of which are endemic to Kerala and 159 threatened) are 900 species of highly-sought medicinal plants.
Its 9,400 km² of forests include tropical wet evergreen and semi-evergreen forests (lower and middle elevations—3,470 km²), tropical moist and dry deciduous forests (mid-elevations—4,100 km² and 100 km², respectively), and montane subtropical and temperate (shola) forests (highest elevations—100 km²). Altogether, 24% of Kerala is forested.
Plants found in Kerala sanctuaries include trees such as teak, maruthu, karimaruthi, rosewood, venteak, vengal, chadachi, mazhukanjiram, bamboo, neem, nanjanathi, sandal, dendrocalamus, marythu, vaka, mulluvenka. elavu, manjakadambu pala, vembu, aval and others, as well as over 1800 flowering plants including 171 grass species, 143 species of orchids etc...