The Periyar Wildlife Sanctuary is home to a variety of animals, which includes different species of mammals, birds. reptiles and fishes.
Mammals: There are 35 major mammals in this park, which includes many elephants and tigers. According to the recent estimate, about 24 Bengal Tigers are found here. Other mammals which you may spot here are White tiger, Indian elephants, Flying squirrel, Wild pig, Sambar, Gaur, Fruit bat,  Nilgiri marten, Nilgiri langur, Sloth bear, Jungle cat and others.
Birds: When it comes to birds, there are more than 250 species of birds in this park. This includes numerous migration birds too. Some of the birds you can watch out for are Malabar grey hornbill, White bellied blue flycatcher, Sunbird, Great hornbill,  Sri Lanka frog mouth, Black necked stork, Oriental darter, Brahminy kite, Little spider hunter, Eagle owl, Nilgiri wood pigeon and others. There is also a large variety of more than 150 butterfly species here
Reptiles: Periyar Wildlife Sanctuary is also home to around 45 species of reptiles. This includes turtles, lizards and snakes. Other common reptiles to spot here include Striped coral snake, Malabar pit viper, King cobra and others. Major amphibians to spot in the park are:Malabar gliding frog, Bicolored frog, Asian toad and others.
Fishes: In the lakes and rivers found in the park, there are around .40 species of fishes. Here you would find fishes like Priyar barb, Periyar trout, channa barb, Travancore loach and others.
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