Thamnophis couchii

Scientic name:
Thamnophis couchiicouchii

Dutch name:
Couch’s kousebandslang

English name:
Western Aquatic Garter Snake/Sierra Nevada Garter Snake

German name:
Westliche Strumpfbandnatter/Couchs Strumpfbandnatter


Pictures of Thamnophis couchii…

Southwestern Oregan, from northern Central California through the Sierra Nevada until the Tehachapi Mountains in southern Central Californië. In western central Nevada and Owens Valley (California) there are “island populations” known.

Is strongly tied to water. Is found in stagnant, quiet running as well as in fast-flowing water.
Oak woods, grassy valleys, dense scrub and pine forests in the mountains.

Fish, amphibians, snails and leeches.
For a garter snake, this species is able to swallow strikingly large preys.

Between late July and October, the young are born.
The higher the animals live, the later in the year, the young are born.
There are up to 40 young born per litter and they are about 20 cm long at birth.

This species requires a large terrarium with a large water basin. Some climbing branches and hiding places may not be missing. Is known as a species that bites when it is picked up. Lies frequent and long lasting in the water basin. A brumation period of at least 1 to 3 months is recommended. Seems to have a preference for live prey (fish), but it seems also to adjust to dead rodents, such as mice, amphibians and earthworms.

Average length of males between 43 and 58 cm.
Average length of females between 44 and 96 cm.
Occurs at altitudes between 100 and 2500 meters. In the highest parts of their range, the active period lasts only 3 to 4 months. In the lower parts up to 10 months. Length of brumation depends greatly on what hight they live within their range.

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