Wildlife of Sri Lanka

Wildlife of Sri Lanka includes its flora and fauna and their natural habitats. Sri Lanka has one of the highest rates of biological endemism (16% of the fauna and 23% of flowering plants are endemic[1]) in the world.

Ecological zones

The mountains and the southwestern part of the country, known as the "wet zone," receive ample rainfall (an annual average of 2500 millimeters). Most of the southeast, east, and northern parts of the country comprise the "dry zone, which receives between 1200 and 1900 mm of rain annually.

Faunal diversity

Number of described species of fauna in Sri Lanka

Group Class No. of Species Endemic species Endemism
Vertebrates Mammalia
125
21
16.8%
Aves
227
26
11.89%
Reptilia
180
110
62.13%
Amphibia
122
112
91.66%
Actinopterygii
93
50
53.76%
Invertebrates Gastropoda
5246
Insecta
11,144
Araneae
383
271
70.75%
Scorpiones
18
7
38.88%
Crustacea
51
51
100%

Vertebrates

Pinnawala 02
Sri Lankan elephant (Elephas maximus maximus), one of the three recognized subspecies of Asian elephant, which is the largest of them all.

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,[2] including the large sloth bear. mammalian orders), with 30 different species. Sri Lanka's surrounding waters are home to 28 species of Cetaceans.

Reptiles

Sri Lanka currently contains 180 species of reptiles, of which 60 are threatened and 110 are endemic. Most of the reptiles are snakes and the largest are two species of crocodile, the mugger crocodile and saltwater crocodile.[2]

Chrysopelea taprobanica
Chrysopelea taprobanica - once endemic, but now found in India as well
Taruga eques at Haggala2
Taruga eques - an endemic species of amphibian

Amphibians

Sri Lanka has one of the richest diversity of amphibians in the world, containing 122 species of amphibians up to January 2019 with many recent discoveries, with 112 endemic species.[2] 52 species of amphibians in Sri Lanka are threatened, all but one of which are endemic.

Birds

Gallus lafayetii Sinharaja 1
The national bird, Sri Lanka junglefowl (Gallus lafayetii) is endemic.

Sri Lanka is home to 227 species of birds (though some past estimates put it as high as 486[3]), 46 of which are threatened (10 critically).[2]

Fish

Cherry barb, Puntius titteya
Cherry barb (puntius titteya) is a tropical fish which is native to Sri Lanka, but introduced populations are established in Mexico and Colombia.

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.[2] There are 8 species of brackish water fish that also come to freshwater, and 24 introduced exotic fish species.

Insects

Albino cockroach from bakamuna, Sri Lanka
Albino cockroach, belongs to Blattodea

Insects belonging to all 32 orders except Grylloblattodea have been recorded from the Sri Lanka.

Major insects

Coleoptera, which is the largest order in whole insect world, also the largest in Sri Lanka, contribute with 3,033 documented species.[4] Lepidopterans, the moths and butterflies has the second largest number of species in Sri Lanka. 245 butterflies species are recorded from Sri Lanka of which 24 are endemic to the island. 1695 species of moths are also found, but the endemism is unknown.

Hymenopterans, which includes ants, bees, wasps contribute to the third largest insect order in Sri Lanka. 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. There are about 70,000 species of bees of order Hymenoptera described in the world with nearly 450 genera and 7 families. Out of them, Sri Lanka comprises 148 species included to 38 genera and 4 families.

True flies and mosquitoes belongs to order Diptera is much highly recorded from Sri Lanka. There are more than 1,341 dipterans found in the island, which earns fourth largest insect order found.[4] About 131 species of mosquitoes that included to 16 genera are described and documented from Sri Lanka. Though they are primarily vectors of many human diseases, majority of mosquitoes in Sri Lanka are harmless to humans and livestock.

Minor insects

The exact species for other orders is still not classified and documented. Walker on 1861, listed 2,007 species belongs to 9 insect orders and Haly on 1890 identified 1,510 beetle species from Sri Lanka. However, after series of many publications from many foreign entomologists, Two Sri Lankan entomologists, Anura Wijesekara and D.P Wijesinghe precisely documented 11,144 insect species belongs to 30 orders from Sri Lanka in 2003.[5][4]

Damselflies categorized in to Suborder: Zygoptera; and dragonflies into Suborder: Anisoptera. There are 121 described species within 13 families can be found in Sri Lanka. 59 species from them are endemic. Hubbard and co-workers documented 46 species in 8 families of order Ephemeroptera. Henneman in 2002 recorded 69 species in order Orthoptera. He also collected few specimen of order Phasmatodea around central hills. 66 species of order Blattodea are found, but not taxonomic evidences. Few species of the order Mantodea were studies by Henry in 1931. Clear documentation of the species within Dermaptera can be found, which was initiated by Burr (1901) and Brindle (1972). Within the termite infraorder Isoptera, 56 species recorded. In 1913, Green compiled a concise catalogue for isopterans in Sri Lanka.[4]

Only 4 species of order Embioptera are recorded. in the order Psocoptera, two subfamilies studied. They are Epipsocidae and Pseudocaeciliidae. Informations of the species of the orders Thysanoptera, Neuroptera, Mecoptera, and Siphonaptera are very few and more studies are required. Only the family Coniopterygidae of Neuroptera have been studied in 1982.[4]

Sri Lanka is known to home for 794 species of Hemipterans. Detailed work of Sri Lankan hemipterans are recorded in book "Catalogue of Hemiptera of Sri Lanka. Sri Lanka comprises 74 species in 46 genera and 6 families of aphids within order Hemiptera. 2 endemic aphid species found on Sri Lanka. Checklists on orders Trichoptera and Strepsiptera are well documented, but recent work is needed.[4]

Crustaceans

Freshwater crabs

All recorded 51 species along with 5 genera in the family Gecarcinucidae are totally endemic to Sri Lanka. 98% of those crabs are IUCN categorized as threatened, endangered or critically endangered animals.

Isopods

Isopods occur abundantly in the sea, freshwater and land. They typically flattened dorsoventrally and mostly scavengers. Sri Lanka harbor 92 species of isopods of 53 genera included to 23 families.

Mangrove crabs

The exact number of species around mangroves and estuaries within coastal marine regions is not clear. but during a research on diversity of mangrove crabs in Kadolkele, Negombo, five species identified, with two new species earlier not document from Sri Lanka.[6] Most marine crabs are much larger and often caught in fishing nets. They are edible foods with high protein. Some of marine edible crabs from Sri Lanka are[7]

Molluscs

There is known over 246 land gastropods of Sri Lanka with 83% endemicity. Sub class Pulmonata consists of 159 species within 23 families and subclass Prosobranchia by 88 species in four families. A total of five land snail genera, namely, Ravana, Ratnadvipia, Acavus, Oligospira and Aulopoma are endemic to Sri Lanka with 14 species included to these genera.[8][9] Thirteen more genera such as Ruthvenia, Thysanota, Cryptozona, Euplecta, Mariaella, Eurychlamys, Corilla, Beddomea, Trachia, Leptopomoides, Micraulax, Tortulosa and Nicida are restricted to Western Ghats of India and Sri Lanka. 18 species are recorded as exotic species and agricultural pests.

Fauna of Sri Lanka also include freshwater snails. The number of marine molluscs of Sri Lanka is not known and there is about 240 species listed meantime in 2006.[10]

Myriapods

The diversity of subphylum Myriapoda, is not well studied in Sri Lanka recently. The remaining facts and checklists of these creatures are dated back to Newport in 1845, which is the first known study about centipedes. Many of centipede works are done more than a century.[11] When considering millipede diversity, which is much higher in study than centipedes. Currently, 104 species of millipedes and 19 species of centipedes are known from Sri Lanka.[12]

Arachnids

Spiders

The detailed work on Sri Lankan spiders were done through checklist by Manju Siliwal and Sanjay Molur's detailed checklist of spiders of South Asia including 2006 revision of Indian spider checklist. This checklist provided all the described spider species of South Asia and part of South-East Asia as well.[13]

According to this checklist, Sri Lanka has 501 species of spiders belongs to 45 families and 213 genera. Out of these 360, 250 are endemic spiders to Sri Lanka with 22 endemic genera.[4]

Ant-mimicking spiders

Spiders in genus Myrmarachne are commonly called ant-mimicking spiders. They are grouped in the family Salticidae of order Araneae. Out of 100+ species described, 12 species are found in Sri Lanka. Three species were described in 2015.

Tarantulas

There are 8 species of tarantulas that are recorded from Sri Lanka. When considering with Indian subcontinent, 15 species of Poecilotheria are recorded from both countries; seven endemics from India and seven endemics from Sri Lanka. One species found in both countries.

Scorpions

Scorpion juvenile found from Bakamuna, Sri Lanka - closer look
juvenile

There are 18 species of scorpions which are found in Sri Lanka. Out of these 18 species, 7 species are endemic to Sri Lanka. In addition to the endemic species, 4 subspecies of the 9 non-endemic species are also endemic to Sri Lanka.

According to 2014 researches, 47 species of pseudoscorpions have been identified from Sri Lanka. Out of this 43 species, 20 species are endemic to Sri Lanka.

The diversity of lesser arachnids within Sri Lanka is not extensive. Some observations on particular species have been undertaken by some local and foreign scientists. According to them, there are 3 species of whip spiders, 4 species of whip scorpions, and 21 species of daddy longlegs found in Sri Lanka.

Ticks and Mites

Ticks belong to superfamily Ixodoidea of the order Parasitiformes. 27 species of Ixodid ticks, commonly called hard ticks, of the family Ixodidae belonging to nine genera have been reported to date from Sri Lanka.

Flora

Rhododendron arboreum zeylanicum flower
Maha rath mala (Rhododendron arboreum ssp. zeylanicum) is a rare subspecies of Rhododendron arboreum found in Central Highlands of Sri Lanka.

Diversity and endemism of plants in Sri Lanka are quite high.[14] There are 3,210 flowering plants belonging to 1,052 genera. 916 species and 18 genera are endemic to the island. Additionally, all but one of the island’s more than 55 dipterocarps are confined to Sri Lanka. Although not lately assessed, Sri Lanka’s ferns are estimated at about 350 species. Diversity, richness, and endemism across all taxa groups are much higher in the wet zone than in the dry zone. Wet zone, which accounts for only a quarter of Sri Lanka’s land area, harbours 88 percent of the flowering plants, and 95 percent of country's flowering plant endemics. The natural forests of Sri Lanka are categorized into eight types.[15]

Sri Lankan Environmentalist, Dr. Gothamie Weerakoon has discovered 51 new varieties of Lichens endemic to Sri Lanka, where 8 of them were found from the Knuckles Mountain Range.[16][17] While Dr. Udeni Jayalal et al found 2 new lichens from Horton Plains in 2012, as Anzia mahaeliyensis and Anzia flavotenuis.[18]

A new Gesneriaceae species Henckelia wijesundarae, endemic to Hiniduma, Galle is described and illustrated in 2016 by Subhani Ranasinghe et al.[19]

See also

References

  1. ^ "Biological diversity of Sri Lanka". Young Biologist Association, Sri Lanka. Retrieved 2009-09-12.
  2. ^ a b c d e The Red List of Threatened Fauan and Flora of Sri Lanka (PDF). Colombo, Sri Lanka: The World Conservation Union (IUCN). 2007. p. 166. ISBN 978-955 -8177 -63-1. Retrieved 2012-09-20.
  3. ^ Kotagama, Sarath W.; Rex I. De Silva; Athula S. Wijayasinha; Vathsala Abeygunawardane (2006). "Avifaunal List of Sri Lanka". Colombo, Sri Lanka: IUCN. ISBN 978-955-8177-51-8. Cite journal requires |journal= (help)
  4. ^ a b c d e f g Bambaradeniya, Channa N. B. "The Fauna of Sri Lanka: Status of Taxonomy, Research, and Conservation". Amazon.com. Google books. Retrieved 23 January 2016.
  5. ^ Anura Wijesekara1 et D. P. Wijesinghe, « History of insect collection and a review of insect diversity in Sri Lanka », Cey. J. Sci. (Bio.Sci.), vol. 31, 2003, p. 43-59 pdf
  6. ^ Priyadarshani, S.H.R. "Diversity of mangrove crabs in Kadolkele, Negombo Estuary, Sri Lanka" (PDF). slafar. Retrieved 23 January 2016.
  7. ^ "The status of Diversity and Species Composition of Crabs in Navanthurai Coastal Area in Jaffna Peninsula of Sri Lanka" (PDF). Postgraduate Institute of Agriculture, University of Peradeniya. Retrieved 23 January 2016.
  8. ^ Naggs F., Raheem D. C., Mordan P. B., Grimm B., Ranawana K. B. & Kumburegama N. P. S. (2003). "Ancient relicts and contemporary exotics: faunal change and survivorship in Sri Lanka’s snail fauna". Slugs & Snails: Agricultural, Veterinary & Environmental Perspectives, British Crop Protection Council Symposium Proceedings No. 80, 103 - 108.
  9. ^ Ranawana K. B. (2006) "Land Snails in Sri Lanka". In: Bambaradeniya C. N. B. The Fauna of Sri Lanka: Status of Taxonomy, Research and Conservation. The World Conservation Union, Colombo, Sri Lanka & Government of Sri Lanka. 84-99. ISBN 955-8177-51-2.
  10. ^ de Silva D. (2006) "Current Status of Taxonomy and Ecology of Marine Molluscs in Sri Lanka". In: Bambaradeniya C. N. B. The Fauna of Sri Lanka: Status of Taxonomy, Research and Conservation. The World Conservation Union, Colombo, Sri Lanka & Government of Sri Lanka. 84-99. ISBN 955-8177-51-2.
  11. ^ Dissanayake, Duminda. S.B. "Records of centipede fauna of Sri Lanka" (PDF). repository.rjt.ac.lk. Retrieved 9 June 2016.
  12. ^ De Zoysa, H.K.S. "Annotated checklist of millipedes (Myriapoda: Diplopoda) of Sri Lanka". Research Gate. Retrieved 9 June 2016.
  13. ^ Molur, Sanjay; Siliwal, Manju. "Checklist of Spiders of South Asia". p. 47. Retrieved 13 March 2016.
  14. ^ "Unique and threatened biodiversity". biodiversityhotspots.org. Conservation International. Archived from the original on 2009-05-04. Retrieved 2009-09-15.
  15. ^ "Forest Resources". Forest resources of Sri Lanka Country report. Food and Agriculture Organization. 2001. Retrieved 2009-09-15.
  16. ^ "Environmentalist discovers 51 species of Lichen". Newsfirst.lk. Dec 8, 2013. Retrieved 8 February 2016.
  17. ^ "The fascinating world of the lichens". Ceylontoday. 2015-03-22. Retrieved 8 February 2016.
  18. ^ "Two new Lichens from Horton Plains". Sundaytimes. March 18, 2012. Retrieved 8 February 2016.
  19. ^ "Henckelia wijesundarae (Gesneriaceae), a new endemic species from Sri Lanka, and lectotypification of Chirita walkerae and C. walkerae var. parviflora". Botanic Garden and Botanical Museum Berlin (BGBM). Retrieved 21 September 2016.

Bibliography

  • Channa N. B. Bambaradeniya, ed. (2006). Fauna of Sri Lanka: Status of Taxonomy, Research and Conservation. Colombo, Sri Lanka: The World Convservation Union (IUCN). p. 308. ISBN 955-8177-51-2.
  • Herat, T. R. Somaratna, S & Pradeepa, 1998, Common Vegetables of Sri Lanka. NARESA, Sri Lanka.
  • Herat, T. R. 2005. Tentative Keys to the Families & Genera of Pteridophytes of Sri Lanka. Author Publisher.
  • Herat, T. R. P. Ratnayake. 2005 An Illustrated Guide to the Fern Flora of Knuckles Conservation Area Sri Lanka. Author Publisher.
  • Herat, T. R. 2005. Endemic Flowering Plants, Part I A Checklist & an Index to A Revised Handbook to the Flora of Ceylon. Author Publisher.
  • Herat, T. R. 2007. Endemic Flowering Plants of Sri Lanka Part II A, Index to the Distribution of Plants with Localities. Environmental Ministry Colombo.
  • Herat, T. R. 2007 Endemic Flowering Plants of Sri Lanka Part II B, Index to the Distribution within Agro Ecological Zones. Environmental Ministry Colombo.
  • Herat, T. R. A. U. Herat, 2008. Index to the Distribution of Ferns & Fern-Allies within the Administrative Districts of Sri Lanka. Author Publisher.
  • Herat, T. R. 2009. YS%, dxlSh imqIaml Ydl i|yd jQ isxy, fmdoq kdu iQpsh’ Author Publisher.

External links

Hakgala Botanical Garden

Hakgala Botanical Garden is one of the five botanical gardens in Sri Lanka. The other four are Peradeniya Botanical Garden, Henarathgoda Botanical Garden, Mirijjawila Botanical Garden and Seetawaka Botanical Garden. It is the second largest garden in Sri Lanka. The garden is contiguous to Hakgala Strict Nature Reserve.

Henarathgoda Botanical Garden

Henarathgoda Botanical Garden is one of the six botanical gardens in Sri Lanka. The botanical garden is situated in Gampaha-Minuwangoda main road, approximately 450 m away from Gampaha railway station. It is about 29 km from Sri Lanka's commercial capital of Colombo.

List of Dermapterans of Sri Lanka

Sri Lanka is a tropical island situated close to the southern tip of India. The invertebrate fauna is as large as it is common to other regions of the world. There are about 2 million species of arthropods found in the world, and still is counting.

The following list provides the earwigs currently identified from Sri Lanka.

List of aphids of Sri Lanka

Sri Lanka is a tropical island situated close to the southern tip of India. The invertebrate fauna is as large as it is common to other regions of the world. There are about 2 million species of arthropods found in the world, and still it is counting. So many new species are discover up to this time also. So it is very complicated and difficult to summarize the exact number of species found within a certain region.

The following list provide the aphid fauna of Sri Lanka.

List of common trees and shrubs of Sri Lanka

The common trees and shrubs of Sri Lanka are a part of the diverse plant wildlife of Sri Lanka.

The following list provides the 704 species of common trees and shrubs of flora of Sri Lanka under 95 families. The list is according to A Field Guide to the Common Trees and Shrubs of Sri Lanka, by Mark Ashton, Savitri Gunatilleke, Neela de Zoysa, M.D. Dassanayake, Nimal Gunatilleke and Siril Wijesundera.Native species are denoted as (N), Introduced species as (I)

List of ecoregions in Sri Lanka

The following is a list of ecoregions in Sri Lanka. Due to High rainfall and even sunlight throughout the year, Sri Lanka exhibits a great variety in ecoregions in all living habitats. Together with Western Ghats, Sri Lanka forms Western Ghats and Sri Lanka hotspot. It is considered one of the eight super-hotspots. Some of the ecorigions also included in Global 200 list too.

List of freshwater crabs of Sri Lanka

Sri Lanka is an island close to the southern end of India with a tropical environment. The invertebrate fauna is as large as it is common to other regions of the world. There are about two million species of arthropods found in the world, and still it is counting with many new species still being discovered. It is very complicated and difficult to summarize the exact number of species found within a certain region.

The following list provide the freshwater crabs of Sri Lanka.

List of mangroves of Sri Lanka

The mangroves of Sri Lanka are a part of the diverse brackish water plant wildlife of Sri Lanka.

List of marine molluscs of Sri Lanka

The marine molluscs of Sri Lanka are a part of the molluscan wildlife of Sri Lanka.

List of mites of Sri Lanka

Sri Lanka is a tropical island situated close to the southern tip of India. The invertebrate fauna is as large as it is common to other regions of the world. There are about 2 million species of arthropods found in the world, and still it is counting. So many new species are discover up to this time also. So it is very complicated and difficult to summarize the exact number of species found within a certain region.

The following list provide mites currently identified in Sri Lanka.

List of non-marine molluscs of Sri Lanka

The non-marine molluscs of Sri Lanka are a part of the molluscan wildlife of Sri Lanka.

Naggs et al. (2003) listed 246 land gastropods for Sri Lanka. Ranawana (2006) listed 18 species of non-indigenous land gastropods in Sri Lanka and he added some species to that list.The fauna of Sri Lanka also includes freshwater snails and freshwater bivalves.

List of scorpions of Sri Lanka

Sri Lanka is a tropical island situated close to the southern tip of India. The invertebrate fauna is as large as it is common to other regions of the world. There are about 2 million species of arthropods found in the world, and still it is counting. So many new species are discover up to this time also. So it is very complicated and difficult to summarize the exact number of species found within a certain region.

The following list provide the scorpions in Sri Lanka.

List of tarantulas of Sri Lanka

Sri Lanka is a tropical island situated close to the southern tip of India.

The following is a non-exhaustive list of tarantulas native to Sri Lanka.

Mirijjawila Botanical Garden

Mirijjawila Botanical Garden is one of the five botanical gardens in Sri Lanka. The other botanical gardens are Peradeniya Botanical Garden, Hakgala Botanical Garden, Henarathgoda Botanical Garden and Seetawaka Botanical Garden.

Pinnawala Open Zoo

Pinnawala Open Zoo (also called Pinnawala Zoo) is a zoological garden in Pinnawala, Sri Lanka, which is situated closer to the Pinnawala Elephant Orphanage. The zoo was opened for public on 17 April 2015. This is the first open-air zoo in Sri Lanka and second zoo in Sri Lanka after Dehiwala zoo. The zoo was opened for the visitors free of charge from 17 – 30 of April 2015.

Ridiyagama Safari Park

Ridiyagama Safari Park is 500 acre safari park, zoo in Ridiyagama area of Hambantota District, Sri Lanka. The park was opened to the public on 28 May 2016.

Sri Lankan sloth bear

The Sri Lankan sloth bear (Melursus ursinus inornatus) is a subspecies of the sloth bear which is found mainly in lowland dry forests in the island of Sri Lanka.

Wildlife of South Asia

The wildlife of South Asia encompasses that of India, Pakistan, Nepal, Bhutan, Bangladesh, Sri Lanka and the Maldives.

Wildlife of India

Wildlife of Pakistan

Wildlife of Bhutan

Wildlife of Bangladesh

Wildlife of Sri Lanka

Wildlife of Maldives

Wildlife of Afghanistan

Wildlife conservation

Fauna of India

Flora of India

List of fish in India

Ecoregions of India

The study of natural history in India

Asiatic Lion Reintroduction Project

List of Zoos in India

Central Zoo Authority of India (CZA)

Zoo Outreach Organisation (ZOO), India is an NGO

Wildlife Institute of India (WII)

Indian Institute of Forest Management (IIFM)

Zoological Survey of India (ZSI)

India Nature Watch (INW) spreading the love of nature and wildlife in India through photography

Geological Survey of India (GSI) also maintains 2 fossil parks currently.

Fossil Parks of India

Protected areas of India

List of protected areas in India

National parks of India

Biosphere reserves of India

Conservation areas of India

Wildlife sanctuaries of India

Reserved forests and protected forests of India

Conservation reserves and community reserves of India

Communal forests of India, including

Sacred groves of India

Social forestry in India

Private protected areas of India

Environmental policy of the Government of India

Indian Forest Act, 1927

Wildlife Protection Act of 1972

Project Tiger

Project Elephant

Ministry of Environment and Forests (India)

Fauna of Sri Lanka
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