Amphibians and Reptiles
Amphibians consists of 14 species including 4 endemics, 5 which are nationally endangered and represents 26% of the total amphibian species on the island. The Common Toad and the Six-Toed Green Frog are the most common species found here. There are also 31 species of reptiles – 20% of the island’s reptile species – including 6 endemic species and 9 which are nationally endangered. The most common reptiles which are seen are the water monitor, common garden lizard and two species of geckos. The star tortoise is also found here which is not regular as it is known to be a dry zone species. A breeding population of the endangered eurasian crocodile, the largest reptile in Muthurajawela. Other reptiles found are the Indian Python, Spectacle Cobra and Russell’s Viper.
Of the 22 mammals found at Muthurajawela, one is the globally-threatened grey slender loris. Another is the fishing cat.
102 species of the birds in Sri Lanka are found here, including one endemic and 19 migrants. The mixture of vegetation types and aquatic habitats in Muthurajawela has made it an ideal eco-zone for a variety of birds. In the wetland eco-system Herons, Egrets, Cormorants, Teal, Waders and Kingfishers are found here. This is also a very important breeding habitat of many aquatic birds. Some of the wetland birds include Little and Indian Cormorant, Cattle, Little, Intermediate & Large Egrets, Purple Heron, Indian Pond Heron, Little Green Heron, Black-crowned Night Heron, Black Bittern, Yellow Bittern, Chestnut Bittern, Black-headed Ibis, Asian Open-bill, Little Grebe, Lesser Whistling Teal, Pheasant-tailed Jacana, White-breasted Water hen, Purple Swamp hen, Water Cock and Common Moorhen.
Some of the migrants and waders include Whimbrel, Eurasian Curlew, Common Sandpiper, Curlew Sandpiper, Marsh Sandpiper, Pintail Snip, Gull-billed Tern, Whiskered Tern, Little Tern and Lesser Crested Tern. Resident waders include the Red-wattled Lapwing, Greater Painted Snip and the Eurasian Thick-nee. Among the Kingfishers, White-throated, Stork-billed, Common and Pied Kingfishers are regularly seen here. The Black-capped Kingfisher, a rare winter migrant, has been recorded here.
Birds of prey include the Shikra, Brahaminy Kite, White-bellied Sea-eagle and the migrant Western Marsh Harrier and Palled Harrier have been recorded. Many forest birds also can be seen in Muthurajawela. The migrants include Indian Pitta, Blue-tailed Bee-eater, Asian Paradise Flycatcher, Asian Brown Flycatcher, Greenish Warbler, Brown Shirke, Forest and Grey Wagtail. Resident forest birds include are Spotted Doves, Sri Lanka Green Pigeon, Blue-faced Malkoha, Pied Cuckoo, Rose-ringed Parakeet, Alexandrian Parakeet, Little Minivet, Plain Prinia, White-rumped and Scaly-bellied Munia, White-bellied Drongo, Red-vented Bulbul, Common Iora, Jungle and House Crows are very common and seem to be the dominant species.
Butterflies and Dragonflies
48 species have been recorded here, none of which are endemic but 6 of which are nationally endangered. The most common butterflies are the blue glassy tiger, glassy tiger and tailed jay butterflies.