Reptiles
Chinese Alligator
Alligator sinensis · also called Chinese alligator, Yangtze alligator, muddy dragon
The Chinese alligator is a small, shy, cold-hardy crocodilian that once shared the Yangtze wetlands with a growing human civilisation and lost. It may survive in the wild as barely a hundred adults, scattered among farm ponds — even as tens of thousands live safely in breeding centres.
Overview
The Chinese alligator historically lived throughout the lower Yangtze river system, in marshes, ponds, lakes, and slow streams. Today the wild animals are confined to a handful of ponds and reservoirs in Anhui province and a few reintroduction sites. It is a freshwater animal, active in the warm months and dormant in a burrow through the winter.
A small, armoured alligator
At 1.5–2 metres, it is one of the smallest crocodilians. It has a slightly upturned snout, fully armoured eyelids, bony plates in the belly skin (unusual for a crocodilian), and broad, blunt rear teeth for crushing the snails and mussels that form much of its diet. It is more cold-tolerant than nearly any other crocodilian, riding out surface ice in its burrow.
Burrows
The Chinese alligator is a serious digger, excavating burrow systems with underwater entrances, air holes, and dry chambers. It overwinters underground from about October to April, and its burrows also shelter many other animals.
The dragon
The species is often proposed as an inspiration for the Chinese dragon — it is native to the cradle of Chinese civilisation, it bellows loudly in the breeding season, it becomes active before summer storms, and its body is long and armoured. Whether it was the source or one influence on a composite myth is unknowable.
Status
The Chinese alligator is Critically Endangered, with perhaps 68–150 mature wild individuals. Its wetland habitat in the lower Yangtze has been almost entirely converted to agriculture and cities, and the survivors face persecution, agrochemical poisoning, and net drowning. Captive breeding has produced over 20,000 animals, and reintroductions at protected sites have succeeded on a small scale — but rebuilding a wild population depends on restoring wetland in one of the most densely developed regions on Earth.
Chinese Alligator: common questions
How is the Chinese alligator different from the American alligator?
They are the only two living alligator species and are each other's closest relatives, but the Chinese alligator is much smaller — rarely over 2 metres against the American alligator's 4 metres or more — with a slightly upturned snout, fully armoured eyelids, bony plates in the belly skin as well as the back, and greater cold tolerance. Behaviourally it is more of a dedicated burrower, and its diet leans heavily on snails and mussels, which it crushes with blunt rear teeth. It is also far shyer and, being so much smaller, essentially harmless to people.
Why is it Critically Endangered?
The Chinese alligator lived in the wetlands and slow watercourses of the densely populated lower Yangtze basin, and almost all of that habitat has been converted to rice paddies, aquaculture ponds, and cities, or altered by dams and pollution. The remaining alligators were squeezed into tiny fragments, often isolated farm ponds, where they are killed as a perceived threat to fish stocks or ducks, poisoned by agricultural chemicals and by eating rats that have themselves eaten poison, and drowned in fishing nets. The wild population fell to perhaps a few dozen breeding adults. In contrast, captive breeding has been extremely successful, with over 20,000 animals in facilities.
Is it really the origin of the Chinese dragon?
It is a popular and plausible idea rather than an established fact. The Chinese alligator is native to the heartland of early Chinese civilisation, it produces a deep, resonant bellowing roar during the breeding season, it emerges from the water and becomes active before summer storms, and it has an armoured, serpentine body — all features that overlap with descriptions of the dragon (long) and with the "thunder dragon" that brings rain. Some scholars connect it specifically to the tuolong or "muddy dragon." Whether it was the direct inspiration or one of several influences on a composite mythical creature is not resolvable.
Can the wild population recover?
There is a realistic path, because the captive population is large and genetically managed and the animal breeds readily. The obstacle is habitat — there is very little intact wetland left in its range, and reintroduced alligators need protected ponds with enough food, safety from persecution, and freedom from pollution. Reintroduction programmes at sites such as Chongming Island near Shanghai and in Anhui have released animals that have survived and bred in the wild, which is encouraging, but scaling this up to a self-sustaining wild population requires restoring and protecting wetland at a scale that competes directly with agriculture and development.