Bombina orientalis

Bombina orientalis
Fire Belly Toad
The Oriental Fire-bellied Toad, (Bombina orientalis) is a small semi-aquatic frog species found in Korea, north-eastern China and adjacent parts of Russia. An introduced population exists near Beijing. They are commonly kept as pets in land and water vivariums. The orientalis is also known as the tuti toad.
Oriental fire-bellied toads are the most easily recognizable species of Bombina. They are typically a bright green with black mottling dorsally, but their coat may also darken to brown and even black depending on the scenery presented. Like other Bombina species, Bombina orientalis have a bright yellow to red (generally bright reddish-orange) ventral region mottled with dark brown to black. The skin on their dorsal side is covered in small tubercles. Although it is typically referred to as a toad, the Fire-Bellied Toad is not a member of the toad family (Bufonidae.) As such, it may properly be referred to as a frog.
They are noted for their bright green and black coloration on their backs, and brilliant orange and black on their underside. In the wild, B. orientalis eat various types of small aquatic arthropods (among other things) from which they obtain Carotene, which helps to color their bellies. These bright colors serve as a warning to predators of toxicity. The toxin is secreted through the skin mostly on the hind legs and sometimes the belly in a milky-like substance when the frog is disturbed or frightened. Not only will they emit this toxin, they will also lay on their back to show the colour of the belly, indicating its toxicity to any predators.
Like other Bombina species, Bombina orientalis is mostly aquatic, inhabiting warm, humid forested regions. They spend most of their time in the water, among dense vegetation.

体长约5厘米。舌呈盘状,周围与口腔粘膜相连。皮肤粗糙。 东方铃蟾身体和四肢灰棕色或绿色,具斑点和大小不等的刺疣;腹面呈橘红色,有黑色斑点。趾间有蹼;雄蟾无声囊。
栖居于池塘或山区溪流石下。5-7月繁殖, 东方铃蟾卵多成群或单个贴附在山溪石块下或水坑内的植物上,每次产卵约百余枚。成体受到惊扰时则举起前肢,头和后腿拱起过背,形成弓形,腹部呈现出醒目的色彩。这种对险情的反应(预感反射),可能是向捕食者暗示它的皮肤有毒的一种信号;德国人称它为警蛙。