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  3. Western Rat Snake

One of the 26 snakes on WAnimals

Reptiles · Squamata · Colubridae

Western Rat Snake

Pantherophis obsoletus

Least Concern

The species is abundant and widely distributed; it faces no significant short-term risk.

Spotted something wrong?

The western rat snake is one of the largest snakes in North America and an outstanding climber: it goes up vertical branchless trunks by bracing its belly scales against irregularities in the bark. It hunts rodents, birds and eggs, and is a well-recognised ally of farmers for the pest control it provides in barns.

Size

1 m – 2.5 m

Life expectancy

25 years

Diet

Carnivore

Feeds mainly on other animals.

Activity

Diurnal

Active mainly during the day.

Social structure

Solitary

Lives and hunts alone, joining others only to breed.

Temperate forestGrassland
2countries23parks17same family

Fun facts

  • GeneralAn excellent climber; it goes up vertical trunks to raid birds' nests.
  • It climbs completely smooth vertical trunks: it folds its body concertina-fashion and presses its belly scales against irregularities in the bark, going up several metres with no branch to help.
  • It mimics a rattlesnake when threatened: it vibrates the tip of its tail against the leaf litter, producing a sound very like a rattle even though it has none.
  • It is a major predator of birds' nests, to the point that several conservation studies of woodland passerines identify it as the chief cause of breeding failure in some forests.

Life cycle and biology

Skeleton type
Vertebrate - internal bony skeleton (reptile)
Habitat and environment
Deciduous woodland, farmland, barns and rural country of eastern North America
Sexual maturity
4 years
Gestation / incubation
65 days of incubation
Litter / clutch size
14 eggs

Sources consulted: Wikipedia (es): Pantherophis obsoletus

Where to find it

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The pins mark the parks where its presence is documented.

Where to see it

Parks and dive sites where this species has been documented — showing 10 of 23.

Related species

Other species in the catalogue with the most in common with Western Rat Snake — same habitat, park, country, tags or family.

Same taxonomic family
Same taxonomic family
Same taxonomic family
Same taxonomic family
Same taxonomic family
Same taxonomic family

Keep exploring

Based on what we already know about western rat snake.

Share an experience, a fun fact or a tip for seeing the western rat snake.
See full glossary
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See its range on the interactive map→
EvergladesUnited States
Great Smoky MountainsUnited States
AcadiaUnited States
Mammoth CaveUnited States
Point PeleeCanada
VoyageursUnited States
Isle RoyaleUnited States
CongareeUnited States
BadlandsUnited States
Theodore RooseveltUnited States
See all 23 parks
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Racer

Coluber constrictor

CountriesUnited States
ParksEvergladesUnited States
TagsCarnivore
Carnivore
Diurnal
Solitary
Reptile
Temperate forest
Grassland
United States
Canada