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There are season for elephant gathering where large concentration of wild elephants together can be seen during that time at a place known as Minneriya in the north central province of the country. Primate safaris are arranged with cultural tours as it is possible to find wide range of primates in place surrounded by cultural heritages mainly in the dry zone. During the early part of the year ( January-April) , the largest animal ever lived in the world you may guess as ‘ blue whale’ can be seen in off shores of southern city Galle. Sinharaja, the tropical rainforest of the country is the place to glue one’s eyes on to the world’s largest mixed species of birds flocking together.
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Mammals
Sri Lanka is home to roughly 123 species of mammals, 41 of which are threatened (9 critically). 16 of the species are endemic, of which 14 are threatened, including the large Sloth Bear, the endemic Sri Lanka Leopard and Sri Lankan Elephant and the Sambar. Bats have the highest amount of species (out of 200 mammalian orders), with 30 different species. Sri Lanka's surrounding waters are home to 28 species of Cetaceans.
Reptiles
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Amphibians
Sri Lanka has one of the richest diversity of amphibians in the world, containing over 119 species of amphibians up to 2015, with 109 endemic species. and has been claimed to have the highest amphibian species density in the world though that has been challenged. 52 species of amphibians in Sri Lanka are threatened, all but one of which are endemic.
Sri Lanka is home to 227 species of birds (though some past estimates put it as high as 486), 46 of which are threatened (10 critically).
Fish
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Sri Lanka contains 93 species of freshwater fish, and 50 of which are endemic to the country. 28 species are categorized as threatened by IUCN. There are 8 species of brackish water fish that also come to freshwater, and 24 introduced exotic fish species.
Butterflies
245 butterflies species are recorded from Sri Lanka of which 24 are endemic to the island
Insects
Insects belonging to all 32 orders except Grylloblattodea have been recorded from the Sri Lanka.The total number of insect species recorded from the island is about 11,144. Coleoptera number 3033 species , Lepidoptera 2158 species, and Hymenoptera 1519 species.
Bees
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Odonates
Main article: List of odonates of Sri Lanka
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Aphids
Main article: List of aphids of Sri Lanka
Sri Lanka comprises 74 species in 46 genera and 6 families. 2 endemic aphid species found on Sri Lanka.
Ants
Sri Lanka is home to 181 species of ants that included to 61 genera and 10 subfamilies. One endemic genus Aneuretus is also included to the list.
Freshwater Crabs
Main article: List of freshwater crabs of Sri Lanka
All recorded 51 species along with 5 genera are totally endemic to Sri Lanka. 98% of those crabs are IUCN categorized as threatened, endangered or critically endangered animals.
Main article: List of non-marine molluscs of Sri Lanka