Morphological characteristics of the tiger frog

Morphological Characteristics of Tiger Frog
Tiger Frog

Female tiger frogs are larger than males. The body length of adult tiger frogs can reach 12cm, and the ideal body weight should be between 250 and 500 grams. The skin is relatively rough, with dark irregular patterns on the head and sides of the body, and dark irregular patterns on the head and sides of the body. The back is yellow-green and slightly brown, with more than a dozen rows of skin ribs arranged vertically, and small warts are spread between the skin ribs.
The belly of the tiger frog is white with irregular patterns, and there are gray-brown spots on the pharynx and chest. There are horizontal spots on the front and rear limbs. Because these patterns look slightly like Gaobi, hence the name. The toes are pointed and rounded, and the toes are fully webbed. The forelimbs are strong, with well-developed finger pads and are gray in color. Male frogs have a pair of external vocal sacs. It has been listed as a national Class II severely protected animal.
Head characteristics
The heads of tiger frogs are generally triangular in shape, with no obvious boundary between the head and the body. The head end is pointed, which can reduce resistance when swimming and facilitate swimming quickly. The mouth is extremely welcoming and rarely opened except for catching food. The eyes are located on the back or sides of the head. above and below.
They all have eyelids, and connected with the eyelids is a transparent nictitating membrane that folds inward. When diving, the nictitating membrane moves upward to cover the eyeball. There is a nasal valve on the external nostril, which can be opened and closed at any time to control the entry and exit of gas. There is a pair of light blue sac-like protrusions on the side of the throat on the ventral surface of the male's head, called the vocal sac, which is a kind of resonance organ that can amplify the throat to emit a large number of bark-like sounds, which plays a role in attracting females. .
Limb characteristics
There are two pairs of limbs in the body. The forelimbs are slightly shorter, each with 4 toes. They mainly support the front of the body, and also help to stabilize the body when catching food and swimming. The hind limbs are longer, each with 5 toes, and there are webs between the toes, which are mainly used for swimming in the water and jumping on the mainland. The whole body is golden yellow with black freckles.

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