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Chalcorana macrops is a species of "true frog", family Ranidae. It is endemic to Sulawesi, Indonesia.[1][3] Common name Masarang frog has been coined for it.[3] The specific name macrops refers to the large eyes of this frog.[2][4]

Chalcorana macrops
Chalcorana macrops (Boulenger, 1897).jpg
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Anura
Family: Ranidae
Genus: Chalcorana
C. macrops
Binomial name
Chalcorana macrops
(Boulenger, 1897)
  • Rana macrops Boulenger, 1897[2]
  • Hydrophylax macrops (Boulenger, 1897)
  • Hylarana macrops (Boulenger, 1897)


Chalcorana macrops grows to at least 45 mm (1.8 in) in snout–vent length. The eyes are very large. The head is rather large with a rounded snout. The tympanum is distinct. The fingers are rather and long slender and have well-developed discs. The toes are two-thirds webbed and have discs that are somewhat smaller than the finger discs. Skin is smooth or with a few small warts dorsally. Dorsal colouration is olive-brown. The sides are greyish and marbled with dark brown. Males have an internal vocal sac.[2][4]

Habitat and conservationEdit

Chalcorana macrops occurs along canopy-covered streams—its presumed breeding habitat—in primary and secondary lowland forests at elevations of 300–1,000 m (980–3,280 ft) above sea level. It is threatened by habitat loss caused by smallholder farming. Also water pollution from agriculture is a threat. Some of its habitat is protected by the Lore Lindu National Park.[1]


  1. ^ a b c IUCN SSC Amphibian Specialist Group (2018). "Chalcorana macrops". IUCN Red List of Threatened Species. 2018: e.T58654A114924064. doi:10.2305/IUCN.UK.2018-2.RLTS.T58654A114924064.en. Retrieved 9 March 2019.
  2. ^ a b c Boulenger, George Albert (1897). "A catalogue of the reptiles and batrachians of Celebes with special reference to the collections made by Drs. P. & F. Sarasin in 1893–1896". Proceedings of the Zoological Society of London. 1897: 193–237.
  3. ^ a b c Frost, Darrel R. (2019). "Chalcorana macrops (Boulenger, 1897)". Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. Retrieved 9 March 2019.
  4. ^ a b Boulenger,, G. A. (1920). "A monograph of the South Asian, Papuan, Melanesian and Australian frogs of the genus Rana". Records of the Indian Museum. 20: 1–226.CS1 maint: extra punctuation (link)