Go to start page
V1.6.10 T351
R748016bfc
Disclaimer & Information
Search
Show Mindmap
 
Poisonous animals
 
Cnidarians (Jellyfish, Corals and Anemones)
 
Venomous fish
 
Scorpions
 
Spiders
 
Hymenopterans (Bees, Wasps and Ants)
 
Sea snakes
 
Terrestrial snakes
 
Miscellaneous animals
 
North America
 
Mexico and Central America
 
South America and the West Indies
 
Europe
 
North Africa, Near and Middle East
 
Central and Southern Africa
 
The Far East
 
Indian Subcontinent and Southeast Asia
 
Australia and the Pacific Islands
 
 
 
 
 
 
 
 

Genus/Species

 

Rhabdophis spp., in particular: R. tigrinus and R. subminiatus, Keelbacks

Species

  • 1. Rhabdophis tigrinus
  • 2. Rhabdophis subminiatus

Taxonomy

Serpentes; Colubridae; Natricinae

Common names

Keelbacks

  • 1. Yamakagashi, Tigernatter
  • 2. Red-necked keelback

Distribution

See link "Distribution" at the top of the page for detailed information on the distribution of R. subminiatus and R. tigrinus.

Biology

Approximately 15 species. Largest specimens up to 1.4 m, R. tigrinus maximum of 1 m, R. subminiatus maximum of 1.3 m. Slender body with a narrow head and large eyes, round pupils. Distinctively carinate dorsal body scales. On each side of the posterior maxilla are a pair of highly elongated, non-grooved teeth (aglyph).

Diurnal, ground-dwelling. Primarily in woodland, but also in wet grasslands or rice fields. Keelbacks feed mainly on frogs and toads, and are thus often found close to water. Several species, including R. subminiatus and R. tigrinus, are found from the lowlands to mountainous areas. R. tigrinus is one of the most common snakes in Japan and is often found in densely populated areas. These snakes are eaten in some regions of China and Japan and are farmed for this purpose.

Keelbacks are non-aggressive and rarely bite.

Risk

Keelbacks are popular terrarium snakes. Thousands of specimens of R. subminiatus have been imported into the USA for this reason.

Although envenoming occurs rarely – many bites do not result in symptoms – several cases of severe envenoming due to the Japanese R. tigrinus have been documented, as well as a few due to R. subminiatus. There are a number of known fatalities due to R. tigrinus. Accidents with these snakes have become common among snake catchers and keepers. Care needs to be taken when feeding the animals in a terrarium!

It is also necessary to be cautious with other Rhabdophis species, as well as with the closely related genera Macropisthodon, Pseudoxenodon and Xenochrophis.

Literature (biological)

Cable et al. 1984, Obst et al. 1984, Ota et al. 1999, Toriba and Sawai 1990, Toriba 1990b, Minton 1990, Cox 1991