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Category Archives: Microhylids

Microhylids found outside of Bangkok

Several other Microhylid species can be found in Thailand outside of Bangkok. They include:

Berdmore’s Narrowmouth Frog
Berdmore's Narrowmouth Frog Microhyla berdmorei

Painted Narrowmouth Frog
Painted Narrowmouth Frog Microhyla pulchra

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Posted by on June 24, 2013 in Microhylids

 

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Inornate Froglet

Micryletta inornata

Inornate Froglet Micryletta inornata

Inornate Froglet found under log in Chatuchak

Inornate Froglet Microhyla inornata

Dorsal view of same frog

Inornate Chorus Frog Micryletta inornata

Inornate Froglet found under log in Uthai Thani Province

Inornate Froglet Micryletta inornata

Inornate Froglet found under board in Suan Luang

Inornate Chorus Frog Micryletta inornata

Inornate Froglet found under concrete in Suan Luang

Inornate Chorus Frog Micryletta inornata

Inornate Froglet in defensive position in Chatuchak

Inornate Froglet  (Micryletta inornata)

Inornate Froglet found at night near mountain stream in Chiang Mai Province

Inornate Froglet Micryletta inornata

Inornate Froglet found under concrete in Chiang Mai Province

Inornate Chorus Frog Microhyla inornata

Inornate Froglet in defensive posture

False Ornate Narrowmouth Frog Micryletta inornata

Inornate Froglet found under wood in Chiang Mai Province

English name: Inornate Froglet (aka “Inornate Chorus Frog”, “False Ornate Narrowmouth Frog”)
Scientific name: Micryletta inornata (formerly Microhyla inornata)
Thai name: Ung-lang chut, Ung-lang khee

Description: Up to 3.1cm long. A small flat frog with a small head and narrow rounded nose. Legs are slender. Light brown, orangish-brown, or olive-brown on top with black markings. A black stripe usually runs through the eye and down the side of the body. Underside is creamy white. These frogs can often be recognized by their frantic, “flea-like” hopping behavior when exposed from cover.

Tadpoles reach 1.9cm long and have a flattened oval body. Like other narrowmouth frog tadpoles, their eyes are on the side of the head and the mouth protrudes from the front. Tail ends in long filament. Their coloration is dark brown.

Call: A high-pitched cricket-like call.

Similar Species: Darkside Narrowmouth Frog has a black marking on its side that does not go through the eye, and lacks the black markings on the back..
Ornate Narrowmouth Frog has a dark brown marking on the back rather than the smaller black markings of the Inornate Froglet.
Asian Painted Frog is larger and heavier with broad cream stripes and lacks black markings.
Four-lined Treefrog is larger with longer legs, a much larger head, and toe pads.

Habitat: Found in forest edges, scrub, parks, and empty lots. Is less common in residential areas than other narrowmouth frogs. Hides below rocks, logs, and boards during the day. Breeds in rain puddles.

Contribution to the ecosystem: Helps control insect populations. Provides food for birds, snakes, lizards, larger frogs, and even large insects and arachnids.

Danger to humans: No danger to humans.

Conservation status and threats: Because of its wide range, large population, and ability to utilize human-disturbed habitat, it has no conservation threats at this time.

Interesting facts: The Inornate Froglet is often referred to as an “explosive-breeding” species. This is because the frogs wait until conditions are right and then breed together. After heavy rains create rain puddles in their habitat, Inornate Froglets will surround the puddles in large numbers and all breed at once, laying their eggs in the new rainpools. Their tadpoles hatch early and develop rapidly, allowing them to take advantage of the rain puddles before they dry out.

References:
Online Field Guide: Micryletta inornata
The IUCN Red List: Micryletta inornata
Thailand Office of Environmental Planning and Policy: A Checklist of Amphibians and Reptiles in Thailand
Travellers’ Wildlife Guides: Thailand
A Field Guide to the Amphibians of Cambodia

 
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Posted by on December 27, 2011 in Frogs, Microhylids

 

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Darkside Narrowmouth Frog

Microhyla heymonsi

Darkside Narrowmouth Frog Microhyla heymonsi

Darkside Narrowmouth Frog found at night near pond in Bang Kapi

Dark-sided Chorus Frog Microhyla heymonsi

Dorsal view of same frog

Darkside Narrowmouth Frog Microhyla heymonsi

View of same frog from front

Dark-sided Chorus Frog Microhyla heymonsi

Darkside Narrowmouth Frog found in forest in Khao Yai

Dark-sided Narrowmouth Frog Microhyla heymonsi

Darkside Narrowmouth Frog found near canal in Cambodia

Dark-sided Chorus Frog Microhyla heymonsi

Darkside Narrowmouth Frog found on plant in Bang Kapi

Darkside Narrowmouth Frog Microhyla heymonsi

Dorsal view of another Darkside Narrowmouth Frog found in empty lot in Bang Kapi

Microhyla heymonsi mating Eduard Galoyan

Darkside Narrowmouth Frogs mating in Vietnam (photo courtesy of Eduard Galoyan)

Microhyla heymonsi mating Eduard Galoyan

Darkside Narrowmouth Frogs mating in Vietnam, with eggs (photo courtesy of Eduard Galoyan)

Darkside Narrowmouth Frog Microhyla heymonsi Eduard Galoyan tadpole

Tadpole of Darkside Narrowmouth Frog found in Vietnam (photo courtesy of Eduard Galoyan)

English name: Darkside Narrowmouth Frog (aka “Dark-sided Chorus Frog”)
Scientific name: Microhyla heymonsi
Thai name: Ung khang da

Description: Up to 2.5cm long. A tiny squat frog with a pointed nose that gives the entire body a triangular shape. Light brown on top, sometimes with a thin light line going down the back. May have other faint markings on the body and legs. Sides are characteristically dark, though sometimes the dark coloration only appears on the very top of the sides. Underside is creamy white.

Tadpoles are approximately 1.5cm long, with a “guitar” shape and a protruding mouth. They are dark in the middle and transparent elsewhere.

Call: A series of clicking runs, similar to the Ornate Narrowmouth Frog.

Similar Species: Inornate Froglet is flatter, has distinct black markings, and will hop around like a flea when exposed.
Ornate Narrowmouth Frog has a dark marking on the back and lighter sides.
Asian Painted Frog is larger and heavier with a broader snout and cream-colored band on the side.

Habitat: Found in forest, agricultural areas, and empty lots. Hides under cover during the day, coming out at night or during rain. Breeds in rain puddles, ponds, marshes, and other shallow bodies of still water.

Contribution to the ecosystem: Helps control ants and other small insects. Provides food for birds, snakes, lizards, larger frogs, and even large insects and arachnids.

Danger to humans: No danger to humans.

Conservation status and threats: Because of its large population and ability to utilize a range of habitats (including those affected by humans), it has no conservation threats at this time.

Interesting facts: Though the Darkside Narrowmouth Frog and Ornate Narrowmouth Frog have a similar size and diet, I have almost never found them in the same exact area. All species have some sort of ecological “niche” that they prefer – and if their “niches” were the same, then these two otherwise similar species would compete with each other and one would eventually outcompete and eliminate the other. In my experience the Darkside Narrowmouth Frog is often found in areas with permanent water sources, while the Ornate Narrowmouth Frog is more often found in areas with temporary water sources. This may or may not be the ecological difference that keeps them from competing directly, but it would take more extensive research to verify these anecdotal observations.

References:
Wild Singapore: Dark-sided Chorus Frog
Ecology Asia: Dark-sided Chorus Frog
The IUCN Red List: Microhyla heymonsi
Thailand Office of Environmental Planning and Policy: A Checklist of Amphibians and Reptiles in Thailand

 
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Posted by on December 27, 2011 in Frogs, Microhylids

 

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Ornate Narrowmouth Frog

Microhyla fissipes

Ornate Narrowmouth Frog MIcrohyla fissipes

Ornate Narrowmouth Frog found near light at night in Chiang Rai Province

Ornate Chorus Frog Microhyla fissipes

Ornate Narrowmouth Frog from above in Laos

Ornate Narrowmouth Frog Microhyla fissipes

Ornate Narrowmouth Frog found under concrete in Chatuchak

Ornate Chorus Frog Microhyla ornata

Ornate Narrowmouth Frog found in Phayao Province

Ornate Narrowmouth Frog Microhyla fissipes

Dorsal view of Ornate Narrowmouth Frog found in wet vegetation in Sukhothai Province

Ornate Chorus Frog Microhyla fissipes

Underside of Ornate Narrowmouth Frog found near light in Chiang Rai Province

Ornate Narrowmouth Frog Microhyla ornata

Ornate Narrowmouth Frog encountering Common Indian Toad at night in Bangkapi

Ornate Chorus Frog Microhyla fissipes

Ornate Narrowmouth Frog calling near fishpond in Chiang Mai Province

Microhyla fissipes Kanchanaburi Mourits Horst Lovholt

Ornate Narrowmouth Frogs mating in Kanchanaburi Province (photo courtesy of Mourits Horst Løvholt)

Ornate Chorus Frog Microhyla fissipes

Recently transformed Ornate Narrowmouth Frog found in Chiang Rai Province

English name: Ornate Narrowmouth Frog (aka “Ornate Chorus Frog”)
Scientific name: Microhyla fissipes (formerly included in Microhyla ornata)
Thai name: Ung-nam tao, Khiad nam ta

Description: Up to 3cm long. A small, squat frog with a pointed nose that gives the entire body a triangular shape. Light brown, reddish-brown, or gray on top with an “ornate” dark marking on the back. The relative color and shape of the marking can be highly variable. Some individuals have a series of thin lines outside the markings that mirror it. Often has a light stripe on the side from the eye to the leg. Underside is creamy white.

Tadpoles are nearly transparent with a “guitar” shape and a protruding mouth.

Call: Its call is quite loud for its size, a series of short staccato sounds in a row that are reminiscent of an insect.

Similar Species: Inornate Froglet is flatter, has distinct black markings, and will hop around like a flea when exposed.
Darkside Narrowmouth Frog has dark sides and lacks the marking on the back.
Asian Painted Frog is larger and heavier with a broader snout.

Habitat: Found in a large variety of moist habitats, including forest, grassland, wetland, rice fields, parks, empty lots, and gardens. Hides under cover during the day, coming out at night or during rain. Breeds in rain puddles, ponds, and other shallow bodies of still water. In my experience it is often found in areas with temporary water sources, while its close relative the Darkside Narrowmouth Frog is more often found in areas with permanent water sources.

Contribution to the ecosystem: Helps control ants and other small insects. Provides food for birds, snakes, lizards, larger frogs, and even large insects and arachnids.

Danger to humans: No danger to humans.

Conservation status and threats: Because of its large population and ability to utilize a range of habitats (including those affected by humans), it has no conservation threats at this time.

Interesting facts: This species, Microhyla fissipes, was formerly thought to be part of another species, Microhyla ornata. In 2005 scientists studying the genetics of the frogs determined that they were two separate species, with Microhyla fissipes being found in China and southeast Asia, and Microhyla ornata being found in Bangledesh and northern India to Pakistan.

References:
Nature Malaysia: Ornate Chorus Frog
The IUCN Red List: Microhyla fissipes
Taxonomic relationships within the pan-oriental narrow-mouth toad Microhyla ornata…
Thailand Office of Environmental Planning and Policy: A Checklist of Amphibians and Reptiles in Thailand
Hong Kong Amphibians and Reptiles (2nd Edition)

 
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Posted by on December 27, 2011 in Frogs, Microhylids

 

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Asian Painted Frog

Kaloula pulchra

Asian Painted Frogs Kaloula pulchra

Asian Painted Frog on Ko Samet

Banded Bull Frog Kaloula pulchra

Large Asian Painted Frog found out at night in Chatuchak

Painted Bullfrog Kaloula pulchra

Asian Painted Frog found under rocks in Suan Luang

Asian Painted Frog Kaloula pulchra with skin fold

Asian Painted Frog found under board on Ko Samet, showing unusual skin fold

Chubby Frog Kaloula pulchra from top

Dorsal view of Asian Painted Frog from under board at edge of marsh in Rangsit

Painted Bullfrog Kaloula pulchra

Asian Painted Frog hiding in tree in Bang Kapi

Asian Painted Frog Kaloula pulchra at night with Common Indian Toad

Asian Painted Frog encountering Common Indian Toad at night in Pathum Thani Province

Asian Bullfrog Kaloula pulchra calling

Asian Painted Frog calling near fish pond in Chiang Mai Province

Asian Painted Frog Kaloula pulchra calling

Asian Painted Frog calling from water in Prachuap Khiri Khan Province (photo by Mourits Horst Løvholt)

Asian Painted Frogs Kaloula pulchra mating

Asian Painted Frogs mating in Prachuap Khiri Khan Province (photo by Mourits Horst Løvholt)

juvenile Asian Painted Frog Kaloula pulchra

Juvenile Asian Painted Frog active during day in light rain on Ko Samet

Banded Bullfrog Kaloula pulchra metamorph

Asian Painted Frog metamorph found at edge of marsh in Chiang Mai Province

Asian Painted Frog  Kaloula pulchra metamorphs

Asian Painted Frog metamorphs on edge of pond in Chiang Mai Province

English name: Asian Painted Frog (aka “Asian Bullfrog”, “Banded Bullfrog”, or “Chubby Frog”)
Scientific name: Kaloula pulchra
Thai name: Ung-ang ban, Ung yan

Description: Up to 8cm long. A heavyset, short-legged frog with a short broad head and blunt snout.  Adults are dark brown with a broad tan or cream stripe on each side.  The underbelly is a dirty white. Juveniles are grey with various black and brown markings (see pictures).

Tadpoles are dark and fat with a very thin tail and transparent tail-fins.

Call: Its loud, easily-recognizable call resembles a cattle bellow.

Similar Species: Inornate Froglet is flatter, has distinct black markings, and will hop around like a flea when exposed.
Ornate Narrowmouth Frog tends to be smaller and has a pointed snout.
Floating frogs (genus Occidozyga) are less round, have rougher skin, and lack the bright side markings.

Habitat: Can be found almost anywhere with sufficient moisture, including overgrown lots, yards, parks, forest, wetlands, rice paddies, and even parking lots. Spends the day buried under rocks, logs, leaves, trash, or within underground burrows. It is active at night, often wandering into homes as it forages for insects. Because its tadpoles develop quickly, it is able to reproduce even in areas with temporary puddles that only last a few weeks.

Contribution to the ecosystem: The Asian Painted Frog helps control ant and termite populations. It is a food source for snakes, monitors, and humans. I have witnessed one being preyed upon by a juvenile monitor.

Danger to humans: This frog will excrete a slightly toxic substance from their skin while held, but the poison is weak and poses no danger to humans. You will notice it on your skin when your fingers start sticking together after handling the frogs.

Conservation status and threats: Though this species is collected both for the pet trade and for food, it has adapted well to urban expansion and appears to be thriving in the wild. It sometimes ends up as an accidental stowaway on shipping vessels and invasive individuals or populations have been found in Singapore, Borneo, Taiwan, Australia, New Zealand, and Guam. It is considered a pest by some standards.

Interesting facts: During the mating season the male frogs float in the water making loud cow-like “honks” to attract the females. The air they suck in in order to make this noise, combined with their already rotund appearance, gives the impression of floating beach balls with legs. The eggs they lay after mating are very small and form a film on the surface of the water.

This frog has spade-like growths on its back feet that assist it in digging backwards into the soil.

References:
Animal Life Resource (Kaloula pulchra): Species Accounts
AmphibiaWeb: Kaloula pulchra
Wikipedia: Banded Bullfrog
Ecology Asia: Banded Bullfrog
Nature Malaysia: Banded Bull Frog
The IUCN Red List: Kaloula pulchra
An Asian species of frog (Kaloula pulchra, Microhylidae) intercepted at Perth International Airport, Australia
Online Field Guide: Kaloula pulchra
Thailand Office of Environmental Planning and Policy: A Checklist of Amphibians and Reptiles in Thailand
Hong Kong Amphibians and Reptiles (2nd Edition)

 
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Posted by on December 26, 2011 in Frogs, Microhylids

 

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