Taxonomic notes: This species was removed from the synonymy of Kaloula baleata.

This species is found in the mountains of the Central Cordilleras and possibly in the Sierra Madres, on northern Luzon Island, and Polillo and Palaui in the Philippines.

It appears to be common, especially in forest and forest edge.

It inhabits lower montane and lowland forests, but occasionally is also found in forest edge habitats. It lives in water-filled tree holes and hollows. Tadpoles have been collected in the same microhabitats.

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The most important threat to this species is the deforestation of lower montane and lowland forests in the Cordilleras. The montane forests are either being converted to vegetable farms or are being developed into real estate.

• 4.1 Roads & railroads
• 2.1.1 Shifting agriculture
• 2.1.2 Small-holder farming
• 2.1.3 Agro-industry farming
• 1.2 Commercial & industrial areas
• 1.1 Housing & urban areas

Only a few protected areas, such as Pulag National Park, are currently found in this region of the Philippines. There is a need for increased protection of the remaining tracts of intact lowland and montane rainforest in the Cordilleras.

• 4.3 Awareness & communications
• 2.1 Site/area management
• 2.3 Habitat & natural process restoration
• 1.1 Site/area protection

Listed as Vulnerable because its Extent of Occurrence is less than 20,000 km2, its distribution is severely fragmented, and there is continuing decline in the extent and quality of its forest habitat on Luzon in the Philippines.

• Alcala, A.C. and Brown, W.C. 1985. Philippine Amphibians: An Illustrated Field Guide. Bookmark Press, Makati City, Philippines.
• Crombie, R.A. n.d.. Updated list of currently recognized species of Amphibians and Reptiles found in the Philippines with distributional summary and Philippine bibliography. Unpublished manuscript.
• Diesmos, A.C., Brown, R.M. and Alcala, A.C. 2002. A new species of narrow-mouthed frog (Amphibia: Anura: Microhylidae; Genus Kaloula) from the mountains of southern Luzon and Polillo Islands, Philippines. Copeia: 1037-1051.
• Frost, D.R. 1985. Amphibian Species of the World: A Taxonomic and Geographic Reference. Allen Press and the Association of Systematic Collections, Lawrence, Kansas.
• Inger, R.F. 1954. The systematics and zoogeography of Philippine Amphibia. Fieldiana 33: 181-531.
• Inger, R.F. 1999. Distributions of amphibians in southern Asia and adjacent islands. In: W.E. Duellman (ed.), Patterns of Distribution of Amphibians: A Global Perspective, pp. 445-482. John Hopkins University Press.
• Parker, H.W. 1934. A Monograph of the Frogs of the Family Microhylidae. Trustees of the British Museum London..
• Ross, C.A. and Gonzales, P.C. 1992. Amphibians and reptiles of Catanduanes Island, Philippines. National Museum Papers (Manila): 50-76.