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Species Profile

Sharp-Tailed Snake

Contia tenuis

Small snake, sharp tail, slug hunter
Michael Benard/Shutterstock.com

Sharp-Tailed Snake Distribution

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Endemic Species
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Close-up of head of a sharp-tailed snake (Contia tenuis)

At a Glance

Wild Species
Diet Carnivore
Activity Nocturnal+
Lifespan 5 years
Weight 0.015 lbs
Status Least Concern
Did You Know?

Adults are usually only 18-33 cm long (record ~46 cm), making it one of the region's smallest snakes.

Scientific Classification

A tiny, secretive, nonvenomous snake characterized by a sharp, spine-like tail tip and longitudinal striping. It is largely fossorial (burrowing) and most often encountered under rocks, logs, and leaf litter.

Kingdom
Animalia
Phylum
Chordata
Class
Reptilia
Order
Squamata
Family
Colubridae
Genus
Contia
Species
tenuis

Distinguishing Features

  • Very small, slender body; typically < 50 cm total length
  • Sharp, pointed tail tip (often used as a defensive decoy)
  • Longitudinal stripes on a brown/gray background
  • Secretive, nocturnal/crepuscular tendencies; rarely seen in the open

Physical Measurements

Length
12 in (10 in – 1 ft 6 in)
Weight
0 lbs (0 lbs – 0 lbs)
Tail Length
2 in (1 in – 2 in)
Top Speed
1 mph
slithering not measured

Appearance

Primary Colors
Secondary Colors
Skin Type Smooth, glossy scales; slender, small-headed, fossorial body form with reduced surface texture.
Distinctive Features
  • Very small snake: adults commonly ~20-30 cm total length; reported maximum ~46 cm (Stebbins, 2003).
  • Diagnostic sharp, spine-like tail tip; may tuck head and present tail as a defensive decoy (Stebbins, 2003; Nussbaum et al., 1983).
  • Dorsum typically brown/gray with longitudinal striping; unlike many juvenile garters, the belly is bright orange/red with distinct black spotting.
  • Head small and not distinct from neck; eyes relatively small-traits consistent with a secretive, burrowing lifestyle.
  • Pacific Northwest distribution: southwest British Columbia through Washington and Oregon into northern California; most records west of the Cascades in moist habitats (Stebbins, 2003; NatureServe species account).
  • Microhabitat: usually found under rocks, logs, woody debris, and leaf litter in moist forests, forest edges, and shaded grasslands (Stebbins, 2003).
  • Diet dominated by soft-bodied invertebrates (especially slugs and slug eggs), plus other small prey; important predator of gastropods in forest-floor food webs (Stebbins, 2003).
  • Nonvenomous and not medically significant; relies on crypsis, burrowing, and tail-tip display rather than biting defenses.

Sexual Dimorphism

Sexual dimorphism is subtle. Males typically have proportionally longer tails and more subcaudal scales (hemipenes accommodation), while females average slightly longer/heavier overall in many populations; differences are not obvious without handling/measurement.

♂
  • Proportionally longer tail beyond the cloaca; often higher subcaudal scale counts (general colubrid pattern; reported for Contia in regional keys).
  • Body may appear slightly slimmer at comparable total length.
♀
  • Often slightly greater average total length and body mass in sample series, though overlap is large (reported in regional natural history summaries).
  • Proportionally shorter tail beyond the cloaca.

Did You Know?

Adults are usually only 18-33 cm long (record ~46 cm), making it one of the region's smallest snakes.

Its tail ends in a sharp, spine-like tip-often shown to predators as a "false head."

It's fossorial: most sightings are under rocks, rotting logs, boards, and deep leaf litter rather than in the open.

A big part of its diet is slugs and slug eggs, so it can be a quiet ally in gardens near natural habitat.

It has smooth, glossy scales (unlike many local garter snakes, which are keeled/rougher-looking).

It's nonvenomous and generally mild-mannered; many individuals try to hide rather than bite.

Because it depends on cool, moist microhabitats, it can disappear from areas that look "green" but lack cover objects and damp soil.

Unique Adaptations

  • Sharp, spine-like tail tip: a distinctive feature used in defensive displays and likely helpful for bracing in tight spaces while burrowing through litter/soil.
  • Slender, small-headed body plan: reduces drag and allows entry into narrow voids in duff, soil, and rotting wood where prey hides.
  • Smooth, shiny scales: facilitate movement through damp substrates and tight cover compared with more strongly keeled-scaled snakes.
  • Moisture-linked ecology: behavioral dependence on cool, humid refuges reduces dehydration risk for a small-bodied snake and keeps it close to slug-rich microhabitats.

Interesting Behaviors

  • Fossorial/secretive foraging: moves through saturated leaf litter, soil, and decaying wood; most active at the surface during cool, wet periods (often after rains).
  • Cover-object fidelity: frequently found beneath the same types of stable shelters (flat rocks, bark slabs, downed wood), especially where humidity stays high.
  • Tail-tip defense display: when disturbed, it may tuck its head and elevate/wiggle the pointed tail tip, directing attention away from the head.
  • Freeze-and-hide strategy: instead of fleeing across open ground, it commonly stays still, wedges into crevices, or threads into litter/soil.
  • Microhabitat hunting: searches in the boundary layer under litter/wood where slugs and eggs are concentrated, helping regulate soft-bodied invertebrates locally.

Cultural Significance

Sharp-tailed Snake (Contia tenuis) is a rarely seen forest-floor snake in the Pacific Northwest. It eats slugs and slug eggs, is a helpful native, and is used to teach why leaf litter, downed wood, and rocks matter.

Myths & Legends

Scientific naming lore: the species was formally described in 1852 (Baird & Girard); the epithet tenuis is Latin for "slender," reflecting its thin, threadlike build.

Field lore in the Pacific Northwest says Sharp-tailed Snake (Contia tenuis) is easiest to find during the first cool, steady rains in spring or fall, when they come out under rocks and boards.

Garden and woodpile stories say leaving flat rocks, old logs, and untreated boards at the edge of woods can "invite" Sharp-tailed Snakes (Contia tenuis). It's a simple care story tied to their secretive, cover-dependent life.

Conservation Status

LC Least Concern

Widespread and abundant in the wild.

Population Stable

Protected Under

  • Canada: Species at Risk Act (SARA) - species has listed, at-risk populations in Canada (jurisdictional listings may apply by designated unit/population)
  • United States: generally not listed under the U.S. Endangered Species Act (ESA) range-wide; protections, where any, are primarily via state/provincial wildlife regulations and habitat/land-use policies

Life Cycle

Birth 4 hatchlings
Lifespan 5 years

Lifespan

In the Wild
2–10 years
In Captivity
3–12 years

Reproduction

Mating System Promiscuity
Social Structure Solitary
Breeding Pattern Seasonal
Fertilization Internal Fertilization
Birth Type Internal_fertilization

Sharp-tailed snakes are solitary and likely mate opportunistically in the spring after seasonal activity resumes. Females typically lay small clutches (about 2-7 eggs) and provide no parental care, consistent with a promiscuous, seasonally breeding system.

Behavior & Ecology

Social Solitary Group: 1
Activity Nocturnal, Crepuscular, Diurnal
Diet Carnivore terrestrial slugs and slug eggs
Seasonal Hibernates

Temperament

Secretive and non-aggressive; usually attempts to escape by burrowing into litter/soil (Stebbins, 2003).
Rarely bites when handled; defensive response more often involves hiding the head and writhing (Nussbaum et al., 1983).
May release cloacal musk when disturbed; defensive display can include curling the tail tip (St. John, 2002).
Surface activity peaks during cool, wet conditions; hotter/drier periods increase underground refuge use (Stebbins, 2003).

Communication

Hissing is uncommon but possible when restrained General colubrid response; St. John, 2002
Chemical signaling via tongue-flicking and vomeronasal sensing, including mate-recognition pheromones Nussbaum et al., 1983
Tactile communication during courtship/mating through body contact and alignment Nussbaum et al., 1983
Defensive cloacal musk release likely conveys chemical deterrence to predators St. John, 2002
Vibration sensitivity through substrate Snake mechanoreception) may aid predator avoidance in leaf litter (Stebbins, 2003

Habitat

Coniferous Forest Deciduous Forest Woodland Shrubland Grassland Coastal Urban Suburban Agricultural/Farmland +3
Biomes:
Temperate Forest Temperate Rainforest Mediterranean Temperate Grassland
Terrain:
Coastal Hilly Mountainous Valley Rocky
Elevation: Up to 7217 ft 10 in

Ecological Role

Specialized invertebrate predator (gastropod-focused) in forest/woodland floor and riparian edge microhabitats.

Helps regulate populations of terrestrial slugs and small snails (including species that can be agricultural/garden pests) Contributes to energy transfer within leaf-litter food webs by converting gastropod biomass into reptile biomass available to higher predators Supports decomposition dynamics indirectly by influencing gastropod grazing pressure on fungi, detritus, and seedlings

Diet Details

Main Prey:
Terrestrial slugs Slug eggs Small terrestrial snails

Human Interaction

Domestication Status

Wild

Sharp-tailed Snake (Contia tenuis) is a wild, not-domesticated North American colubrid. It has no history of breeding by people and is rarely kept because it lives underground and eats slugs and slug eggs. Human contact is mostly accidental (found under rocks/logs), for conservation, or science. Harms are rare: habitat disturbance, road deaths, and illegal collecting.

Danger Level

Low
  • Nonvenomous; bites are uncommon and typically minor if handled (small teeth, superficial punctures possible)
  • Potential Salmonella exposure risk typical of reptiles if hygiene is poor
  • Primary safety risk is indirect: slipping/strain while lifting rocks/logs during searching; habitat damage from repeated disturbance

As a Pet

Not Suitable as Pet

Legality: Legality varies by area. Many West Coast places limit or ban taking Sharp-tailed Snakes (Contia tenuis). Permits may be needed; captive-bred pets are rare, so buying risks illegal wild collecting. Check local rules.

Care Level: Expert Only

Purchase Cost: Up to $150
Lifetime Cost: $300 - $1,200

Economic Value

Uses:
Low direct commercial value Ecosystem service (invertebrate predation; often associated with slug/slug-egg consumption) Scientific/educational value (biodiversity monitoring, environmental education) Conservation value (indicator of moist microhabitats with intact ground cover and coarse woody debris)
Products:
  • No established commercial products
  • Non-market benefits: educational displays/interpretation (rare), research data, conservation outcomes

Relationships

Predators 7

Northwestern Garter Snake Thamnophis ordinoides
Common Garter Snake
Common Garter Snake Thamnophis sirtalis
Red-tailed Hawk Buteo jamaicensis
Great Blue Heron
Great Blue Heron Ardea herodias
Raccoon
Raccoon Procyon lotor
Striped Skunk Mephitis mephitis
Shrews Sorex spp.

Related Species 4

Long-tailed Snake Contia longicaudae Shared Genus
Common Garter Snake
Common Garter Snake Thamnophis sirtalis Shared Family
Northwestern Garter Snake Thamnophis ordinoides Shared Family
Ring-necked Snake Diadophis punctatus Shared Family

Ecological Equivalents 3

Animals that fill a similar ecological role in their ecosystem

Rubber Boa
Rubber Boa Charina bottae Frequently shares the same cool, moist Pacific Coast forest microhabitats—under logs and rocks and in leaf litter—and is similarly secretive and fossorial. Both are most often detected by turning cover during wet seasons rather than by active surface encounters.
Ring-necked Snake Diadophis punctatus A small, nocturnal and crepuscular, cover-associated snake commonly found under rocks and logs in moist woodland edges. It overlaps in prey niche through heavy use of soft-bodied invertebrates (especially slugs) and small salamanders, making it a functional ecological analogue where they co-occur.
Northwestern Garter Snake Thamnophis ordinoides Often occupies nearby wet meadow and forest-edge mosaics and forages in the same cool, damp conditions. Although more surface-active than Contia tenuis, it overlaps in diet (earthworms and slugs) and can use the same cover objects.

“A Sharp-tailed snake uses its spiny tail to hold down its slippery prey”

Sharp-tailed snakes or Sharptail snakes are also called Pacific brown snakes or gentle brown snakes. Their range includes the western part of the United States and continues up into British Columbia in Canada. These snakes spend a lot of their time hiding in moist places beneath rocks. They are carnivores eating mostly a diet of slugs. Sharptail snakes are small in size and non-venomous which is why they are kept as a pet in some households.

5 Incredible Sharp-tailed Snake Facts!

  • These snakes have recurved teeth that allow them to capture and pull in slippery slugs
  • This snake has a lifespan of up to 10 years
  • Though this snake looks similar to a common garter snake, it has no close relatives
  • A Sharptail snake baby or hatchling is about as long as an earthworm
  • This snake has a conservation status of Least Concern in the United States and Endangered in British Columbia

Sharp-Tailed Snake Scientific Name

The scientific name for a Sharptail snake is Contia tenuis. Contia refers to the genus of this snake and tenuis is Latin meaning thin or fine. The Sharptail snake is the only member of the Contia genus.

This small reptile is sometimes called the common Sharptail snake, the Pacific brown snake, or even the gentle brown snake. The fact that it’s sometimes called the gentle brown snake says a lot about its mild nature.

It belongs to the Colubridae family and is in the Reptilia class.

Sharp-Tailed Snake Appearance & Behavior

The common Sharp-tailed snake has a mixture of gray and red scales on its back paired with white and black bands on its belly. Their eyes are dark and round. This reptile gets its name from the sharp, spiny end of its tail. Biologists believe the purpose of its tail is to hold a slippery slug in place while trying to eat it.

A sharptail snake is small in size and about the same thickness as a pencil. Females are larger than males. This snake normally measures about 12 inches, but some grow longer. The longest this snake can measure is 19 inches. They weigh around five ounces. For comparison, a 12-inch long sharp-tailed snake would be equal in length to four-fifths of a single bowling pin. A snake weighing five ounces is equal in weight to an average baseball.

It’s common for these snakes to be mistaken for garter snakes. Garters and sharp-tailed snakes are both small, though garter snakes are longer. They are both non-venomous, have dark scales, and include slugs in their diet. One of the biggest differences between these two snakes is a garter snake doesn’t have a sharp tail. Also, garter snakes give live birth to their young while sharp-tailed snakes lay eggs.

This snake is small in size and non-venomous, so it has very few ways to defend itself against predators. Their most powerful defense is their ability to hide under rocks and in tiny crevices where predators can’t reach them. If this snake is grabbed by a predator, it whips its spiny tail back and forth at the animal. Though this doesn’t cause injury, it can startle the predator allowing the snake a few extra seconds to slip away.

Baby sharp-tailed snakes or hatchlings coil up into a tight ball when confronted by a predator. Scientists believe they do this with the thought that they’re making themselves too large for a predator to swallow.

This snake is considered semi-social. Scientists have reported seeing several sharp-tailed snakes living together under the same rock. Plus, females sometimes lay their eggs in a communal nest where other snakes have laid their eggs. A group of snakes is sometimes called a pit or a den. These snakes also spend a lot of time hunting and moving through their territory alone.

Sharp-tailed snakes are shy and non-aggressive. Oftentimes, they will slither for cover at any sign of a threat. A person who manages to catch one of these quick snakes is likely to see it roll into a ball in their hand as opposed to trying to bite.

The docile nature of this snake makes it seem like the perfect pet for many reptile enthusiasts. But these snakes need a specific type of care and environment including a regulated temperature to thrive. So, instead of keeping one as a pet, it’s better to appreciate them in the wild where they can care for themselves. Consider yourself lucky if you find one of these elusive snakes in the forest!

A Sharp-tailed Snake (Contia tenuis), near Lake Nacimiento, San Luis Obispo County, California

A Sharp-tailed Snake (Contia tenuis), near Lake Nacimiento, San Luis Obispo County, California

Sharp-Tailed Snake Habitat

Sharp-tailed snakes live in the western part of the United States and up into British Columbia. Specifically, these snakes are found in California, Washington State, Oregon as well as Canada, and Vancouver Island. Their habitat includes forests, woodlands, and grasslands. They live in a moist environment under rocks, in hollow trees, and in crevices. These snakes like cool conditions and stay under shady bushes during the day when it turns really hot in the summer. In fact, this is what makes the sharp-tailed snake different from many other types of reptiles. Most snakes are active in warm weather whereas Sharp-tailed snakes like to move around during cool weather.

In areas where it’s extremely cold in the winter, they go into a state of brumation from about November to February. A snake in brumation doesn’t sleep like a snake in hibernation. Instead, it still moves around and hunts, but at a slower rate to conserve energy and stay warm. In brumation, a snake sleeps a lot and has a very low metabolic rate.

Sharp-tailed snakes move around within their territory. They are especially active during the rainy season moving to different areas while making burrows and searching for prey.

Predators and Threats

Sharp-tailed snakes are carnivores. They hunt for food during the coolest hours of the day. Because of their small size, these snakes have a diet of small insects. They usually find their prey in the mud beneath the rocks and in the rock crevices where they spend a lot of their time.

What eats a sharp-tailed snake?

The predators of a sharp-tailed snake include bigger snakes, birds, foxes, and cats. All of these predators are fast, and some have the ability to find a sharp-tailed snake even if it disappears beneath a rock.

What does a sharp-tailed snake eat?

A sharp-tailed snake has a diet consisting mostly of slugs and the eggs of slugs. These small creatures live in the same habitat as this snake and are easy for it to find and capture. Sharp-tailed snakes are known for their burrowing skills, so this is another way they find slugs and slug eggs to consume.

Habitat loss is a threat to some of these snakes. But they are spread out over such a large territory this threat is considered mild. There is some threat posed to this snake by people who capture them to sell for a high price in pet shops or online via reptile dealers. There are no laws in place to prevent the sale of these non-venomous snakes. They are sold for a high price because of their size and gentle nature.

Fortunately, despite these threats, this snake is still thriving in the United States. However, due to habitat loss, this snake is listed as Endangered in British Columbia. The conservation status of the sharp-tailedsnake in the United States is Least Concern.

Sharp-Tailed Snake Reproduction and Life Cycle

The breeding season of the sharp-tailed snake occurs in early spring. Though the exact gestation period of this snake is unknown, females usually lay three to eight eggs in late summer. These snakes have been known to lay eggs in communal nests alongside the eggs of other Sharptail snakes. The eggs of this snake have a soft shell and measure less than an inch long. As a note, though Sharptail snakes are similar in appearance to garter snakes, there is a big difference between these two reptiles in terms of reproduction. While Sharptail snakes lay eggs, garter snakes give birth to live young.

Baby sharp-tailed snakes are called hatchlings or snakelets. They must learn to survive on their own, without receiving any care from their parents, immediately after hatching from their egg. Not surprisingly, the hatchlings of this small snake are very tiny. They’re sometimes mistaken for earthworms! It takes three years for a young snake to reach adult size.

The lifespan of a sharp-tailed snake can vary depending on the number and variety of predators in its habitat. But these snakes have a lifespan of up to 10 years.

Sharp-Tailed Snake Population

Biologists estimate the population of this snake as more than 100,000. Though they face threats of habitat loss and capture for the pet market, they have a stable population in the United States. Their conservation status in the U.S. is Least Concern. But, in British Columbia, they are categorized as Endangered due to habitat loss there.

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Sources

  1. Wikipedia / Accessed May 31, 2021
  2. The Reptiles of British Columbia / Accessed May 31, 2021
  3. Burke Museum / Accessed May 31, 2021
  4. HAT / Accessed May 31, 2021
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Sharp-Tailed Snake FAQs (Frequently Asked Questions)

Sharptail snakes are carnivores eating mostly a diet of slugs. In fact, they have recurved teeth designed to grab and hold onto a slug’s slippery body. Their spiny tail keeps a slug still while the snake is eating it. They also eat slender salamanders on occasion.