Ceratobatrachus is a monotypic frog genus in the Ceratobatrachidae family. The genus is also known under the common name triangle frogs. The sole member of the genus is Ceratobatrachus guentheri (common names: Solomon Island leaf frog, Solomon Island eyelash frog and Gunther's triangle frog). This frog can be found throughout the Solomon Islands archipelago (both in the Autonomous Region of Bougainville of Papua New Guinea and in the Solomon Islands, an independent state), except for San Cristobal.
Ceratobatrachus guentheri is abundant throughout the Solomon Islands where it can be found on the forest floor in tropical rain forests; it can also live in secondary forests, rural gardens, and in other modified habitats. They average about 7.6–10 cm (3–4 in) in length, with females being larger than the males. Their cryptic coloration and dorsal patterns aid in their camouflage—often mimicking decaying leaf matter—giving rise to the common name of "leaf frog". They are an interesting example of a species that undergoes direct development—there is no free-living tadpole stage; instead, the juvenile emerges from the egg as a fully developed froglet. Eggs are laid in small hollows at the base of trees. They grow rapidly from a 3 mm (1⁄8 in) long froglet on a diet of tiny insects until they can take the adult diet of insects, arthropods, smaller amphibians and small reptiles. They are ambush predators, pouncing quickly on any prey animals that happen to wander within their reach – including their own species.
- Richards, S. & Parker, F. (2004). "Ceratobatrachus guentheri". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 22 February 2014.
- Frost, Darrel R. (2014). "Ceratobatrachus Boulenger, 1884". Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. Retrieved 22 February 2014.
- "Ceratobatrachus Boulenger, 1884". Integrated Taxonomic Information System.
- Frost, Darrel R. (2014). "Ceratobatrachus guentheri Boulenger, 1884". Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. Retrieved 22 February 2014.
- Solomon Island palm frog (Palmatorappia solomonis)