Smooth-sided toad（Image source：Taucce, P. P., Costa-Campos, C. E., Carvalho, T. R., & Michalski, F.， CC BY 4.0 ） The smooth-sided toad ( Rhaebo guttatus ) is a large toad belonging to the family Bufonidae. It is widely distributed across the Amazon Basin in South America, including Ecuador, Colombia, Peru, Bolivia, Brazil, Venezuela, Guyana, Suriname, and French Guiana. In the wild, this species primarily inhabits tropical humid lowland rainforests, especially riparian fore

Yellow and black walking toad（Image source：Pierre-Yves Vaucher， CC BY-SA 2.5 ） The yellow and black walking toad ( Melanophryniscus stelzneri ) belongs to the family Bufonidae and is a small, vividly colored amphibian endemic to South America. It is distributed across Argentina, Paraguay, Uruguay, and southern Brazil, and may also extend into parts of Bolivia. In the wild, this species inhabits dry grasslands, rocky outcrops, and the edges of wetlands. Breeding depends on s

Greater siren（Image source：Wes Anderson， CC BY 4.0 ） The greater siren ( Siren lacertina ) is one of the largest amphibians in North America and belongs to the family Sirenidae. Its elongated, eel-like body gives rise to its common name. It is widely distributed across the southeastern coastal plains of the United States, ranging from Washington, D.C. southward to Florida and westward to Alabama. Scattered populations have also been reported in Texas and northeastern Mexico

Tiger salamander（Image source：Carla Isabel Ribeiro， CC BY-SA 3.0 ） The tiger salamander ( Ambystoma tigrinum ), also known as the barred tiger salamander, is one of the largest terrestrial salamanders in North America. Adults typically measure 15 to 25 cm in length, with some individuals reaching up to 35 cm. It is characterized by a black or dark brown body covered with yellow to green blotches or stripes resembling tiger patterns, which gives the species its name. They po

Sword-tail newt（Image source：Totti， CC0 1.0 ） The sword-tail newt ( Cynops ensicauda ) is an amphibian endemic to the Ryukyu Islands of Japan and represents one of the larger members of the genus Cynops . Males can reach approximately 12.8 cm in total length, while females may grow up to 18 cm. The species exhibits clear sexual dimorphism: females possess tails longer than their bodies, whereas males have shorter, thicker tails that may develop a whitish sheen during the bre

Two-toed amphiuma（Image source：Andrés Camilo Montes-Correa， CC BY-NC 4.0 ） Two-toed amphiuma ( Amphiuma means ) is a large aquatic amphibian distributed across the southeastern United States. It belongs to the family Amphiumidae and is the largest and most widespread member of this group, as well as one of the longest salamanders in North America. Adults typically measure 46 to 116 cm in length, with some individuals exceeding 116 cm. The body is elongated and eel-like, wit

Chinese fire belly newt（Image source：Dobromila， CC0 1.0 ） The Chinese fire belly newt ( Cynops orientalis ), commonly known in the pet trade as the Chinese fire-bellied newt, is a small amphibian with a body length of approximately 6.5 to 10 cm. Its dorsal coloration is typically dark black or grayish-brown, while the most striking feature is the bright orange-red ventral pattern marked with black spots. This aposematic coloration serves as a warning signal to predators, ind

Fire salamander（Image source：Didier Descouens， CC BY-SA 4.0 ） The fire salamander ( Salamandra salamandra ) belongs to the family Salamandridae and is one of the most widespread and relatively large terrestrial amphibians in Europe. Adults are typically black with bright yellow patches or stripes, and some populations may include orange or reddish tones. This highly conspicuous coloration serves as aposematic signaling, warning predators that their skin glands secrete toxin

Axolotls with different color morphs（Image source：Bjorklund21， CC BY-SA 4.0 ） The axolotl, scientifically known as Ambystoma mexicanum , is formally referred to as the Mexican axolotl and is also known as the axolotl. It is a species of salamander native to central Mexico, specifically Lake Xochimilco and Lake Chalco. As a fully aquatic amphibian, the most distinctive feature of the axolotl is its six external gill filaments, which resemble horns and give rise to its commo