Sichuan Narrow-mouthed Frog

Overview

Sichuan narrow-mouthed frog (Kaloula rugifera) is a species of frog in the family of Microhylidae found only in Sichuan province of China. They are cute little creatures with skin colors vary from brown, grey to olive green. 

 Sichuan narrow-mouthed frog is a cute little creature.

Sichuan narrow-mouthed frog is a cute little creature.

 Sichuan narrow-mouthed frog.

Sichuan narrow-mouthed frog.

 The size of the Sichuan narrow-mouthed frog is relatively small. Here the diameter of the coin is 25 mm.

The size of the Sichuan narrow-mouthed frog is relatively small. Here the diameter of the coin is 25 mm.

 The skin colors of Sichuan narrow-mouthed frogs vary from brown and grey to green. On the left is a female, on the right is a male.

The skin colors of Sichuan narrow-mouthed frogs vary from brown and grey to green. On the left is a female, on the right is a male.

 A Sichuan narrow-mouthed frog with grey skin color.

A Sichuan narrow-mouthed frog with grey skin color.

 Sichuan narrow-mouthed frog.

Sichuan narrow-mouthed frog.

 Sichuan narrow-mouthed frog.

Sichuan narrow-mouthed frog.


Tree Climbers

Sichuan narrow-mouthed frogs are nocturnal animals. Besides hiding inside cavities on the ground, they can also climb up trees and hide inside tree holes. During breeding season from June to August, they can also be found gathering near temporary pools and ponds.

 A Sichuan narrow-mouthed frog hidden inside a tree hole.

A Sichuan narrow-mouthed frog hidden inside a tree hole.

 A Sichuan narrow-mouthed frog hidden inside a tree hole.

A Sichuan narrow-mouthed frog hidden inside a tree hole.

 A Sichuan narrow-mouthed frog climbing on a tree trunk.

A Sichuan narrow-mouthed frog climbing on a tree trunk.

 A Sichuan narrow-mouthed frog, with its eyes closed when jumping.

A Sichuan narrow-mouthed frog, with its eyes closed when jumping.


From Eggs to Tadpoles

A female Sichuan narrow-mouthed frog can lay up to 3000 eggs in the water. Each egg has a dark yolk in the center, encapsulated by transparent jelly. It takes about 20 days for the eggs to develop into little frogs.

 Eggs/frogspaw of a Sichuan narrow-mouthed frog, floating on the water. The jelly encapsulating the dark yolks is transparent and almost invisible (left). But when light was shined on the eggs, the refraction of the jelly (white circles) could been seen (right). 

Eggs/frogspaw of a Sichuan narrow-mouthed frog, floating on the water. The jelly encapsulating the dark yolks is transparent and almost invisible (left). But when light was shined on the eggs, the refraction of the jelly (white circles) could been seen (right). 

 Tadpoles development inside the frogsprawn.

Tadpoles development inside the frogsprawn.

 Tadpoles of Sichuan narrow-mouthed frogs.

Tadpoles of Sichuan narrow-mouthed frogs.