Long-nosed Horned Frog
Encyclopedia
The Long-nosed Horned Frog (Megophrys nasuta) or the Malayan Horned Frog is a species of frog restricted to the rainforest areas of southern Thailand
and Peninsular Malaysia
to Singapore
, Sumatra
and Borneo
.
s running down this species back. One pair starts behind the eye and ends near the groin, the other pair starts at corner of the eye and ends roughly halfway between the armpit and groin. The dorsum has randomly scattered, enlarged tubercles. Arms and legs are barred with skin folds and are mottled cream and different shades of brown. The toes are slightly webbed and the fingers are free from webbing. The tympanum
is indistinct and the iris is golden brown.
s among leaf litter. The call is a loud, resonating, metallic "honk" or "henk". Breeding takes place in streams, female frogs attach the eggs to the underside of partially or full submerged rocks or logs. The capsules are large and few in number. This species may lie still on the forest floor waiting for an unsuspecting prey item to pass by, they then lash out and engulf the prey. They typically feed on spiders, small rodents, lizards and other frogs.
of frog and can be distinguished from other species of the Megophrys genus by the elongated nose and the two pairs of dorsolateral skin folds.
Thailand
Thailand , officially the Kingdom of Thailand , formerly known as Siam , is a country located at the centre of the Indochina peninsula and Southeast Asia. It is bordered to the north by Burma and Laos, to the east by Laos and Cambodia, to the south by the Gulf of Thailand and Malaysia, and to the...
and Peninsular Malaysia
Peninsular Malaysia
Peninsular Malaysia , also known as West Malaysia , is the part of Malaysia which lies on the Malay Peninsula. Its area is . It shares a land border with Thailand in the north. To the south is the island of Singapore. Across the Strait of Malacca to the west lies the island of Sumatra...
to Singapore
Singapore
Singapore , officially the Republic of Singapore, is a Southeast Asian city-state off the southern tip of the Malay Peninsula, north of the equator. An island country made up of 63 islands, it is separated from Malaysia by the Straits of Johor to its north and from Indonesia's Riau Islands by the...
, Sumatra
Sumatra
Sumatra is an island in western Indonesia, westernmost of the Sunda Islands. It is the largest island entirely in Indonesia , and the sixth largest island in the world at 473,481 km2 with a population of 50,365,538...
and Borneo
Borneo
Borneo is the third largest island in the world and is located north of Java Island, Indonesia, at the geographic centre of Maritime Southeast Asia....
.
Physical description
This species is a large frog ranging from 100-120 mm in length. They are light to dark brown on the dorsal surface with varying patterns and camouflage very well with the forest floor. The throat is black-dark brown and diffuses into cream-yellow halfway along the ventral surface. The upper eyelids and snout are drawn out into long triangular projections, forming what looks like "horns", giving them their common name. There are two pairs of dorsolateral skin foldSkin fold
Skin folds are areas of skin where it folds. Many skin folds are distinct, heritable anatomical features, and may be used for identification of animal species, while others are non-specific and may be produced either by individual development of an organism or by arbitrary application of force to...
s running down this species back. One pair starts behind the eye and ends near the groin, the other pair starts at corner of the eye and ends roughly halfway between the armpit and groin. The dorsum has randomly scattered, enlarged tubercles. Arms and legs are barred with skin folds and are mottled cream and different shades of brown. The toes are slightly webbed and the fingers are free from webbing. The tympanum
Tympanum (zoology)
The tympanum is an external hearing structure in animals such as frogs, toads, insects, and mammals, to name a few.-Anurans:In frogs and toads, it is located just behind the eye. It does not actually process sound waves; it simply transmits them to the amphibian's inner ear, which is protected...
is indistinct and the iris is golden brown.
Ecology and behaviour
This species lives in permanently damp and cool lowland and submontane rainforestRainforest
Rainforests are forests characterized by high rainfall, with definitions based on a minimum normal annual rainfall of 1750-2000 mm...
s among leaf litter. The call is a loud, resonating, metallic "honk" or "henk". Breeding takes place in streams, female frogs attach the eggs to the underside of partially or full submerged rocks or logs. The capsules are large and few in number. This species may lie still on the forest floor waiting for an unsuspecting prey item to pass by, they then lash out and engulf the prey. They typically feed on spiders, small rodents, lizards and other frogs.
Similar species
This species is unlikely to get confused with any other genusGenus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...
of frog and can be distinguished from other species of the Megophrys genus by the elongated nose and the two pairs of dorsolateral skin folds.