AnimaliaHighest rank in taxonomy. Groups all life into domains: Animalia, Plantae, Fungi, etc.IUCN LCInternational Union for Conservation of Nature — the world authority on species extinction risk, using standardized criteria. — Least Concern — widespread and abundant; not at immediate risk of extinction.In ProgressCurrent stage of this record in the editorial review workflow. Recent Sighting
Rhadinaea pulveriventris
Dusky Graceful Brown Snake
(Boulenger, 1896)
Detailed Texts Multi-lang
A slender, secretive snake characterized by a dark, dusky brown dorsal coloration, often with a finely dusted or speckled appearance on its ventral side, from which its scientific name is derived.
Added by
Anonymous Curator
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Under Review
Last modified by
Julia Trouin
TaxonomyBiological classification ranks placing this species within the tree of life, from Kingdom down to Genus.
PhylumRank below Kingdom. Groups organisms sharing a fundamental body plan (e.g., Chordata = vertebrates and some invertebrates).Chordata
ClassRank below Phylum. Subdivides by structural traits (e.g., Mammalia, Aves, Reptilia, Insecta).Reptilia
OrderRank below Class. Groups related families sharing common ancestry (e.g., Carnivora, Primates).Squamata
FamilyRank below Order. Groups closely related genera (e.g., Felidae = cats, Canidae = dogs).Colubridae
GenusRank just above Species. The first word in the two-part binomial scientific name.Rhadinaea
Taxonomic AuthorityThe scientist who first formally described and published this species, followed by the year of publication.(Boulenger, 1896)
Record Completeness
96%Coming soon
Ecology & StatusHow this species lives: habitat preferences, diet, behavior, population status, and role in its ecosystem.
OriginWhether the species is native (evolved here), endemic (found only here), or introduced by human activity.
Native
Population TrendDirection of change in population size over time: increasing, stable, decreasing, or unknown.
Stable
Breeding SeasonTime of year when this species typically reproduces or flowers.
Year Round
Trophic RolePosition in the food chain: producer, herbivore, carnivore, omnivore, decomposer, or parasite.
Carnivore
Recent SightingsWhether this species has been observed in the wild in Costa Rica within recent years.
Yes
Habitat SummaryOverview of the specific ecosystems and environments where this species is found in Costa Rica. Multi-lang
Inhabits cool, humid montane forests and cloud forests, typically found under logs, rocks, or deep leaf litter.BehaviourDaily activity patterns, movement, territory use, foraging style, and seasonal behavioral changes. Multi-lang
Secretive, nocturnal to crepuscular species. It remains buried or hidden under cover during the day.Social ActivitySocial structure: whether the species is solitary, paired, or colonial; hierarchy and communication. Multi-lang
Solitary, minimal social behavior.Feeding GuildWhat the species eats, how it forages or hunts, and its role as a consumer in the food web. Multi-lang
Specialized invertebrate predator.Trophic Chain DetailsSpecific interactions in local food webs: prey species, predators, competitors, and scavengers. Multi-lang
Diet primarily consists of small invertebrates and possibly tiny amphibians. Preyed upon by larger snakes and birds.Reproductive BehaviourMating strategies, courtship displays, nesting or spawning behavior, and parental care. Multi-lang
Oviparous; lays small clutches in protected, damp soil.Physical Measures
Length (cm)
20.0 - 35.0 cm
Weight (Grams)
5 g - 15 g
Offspring per cycleTypical number of young (live births, eggs, or seeds) produced by one adult in a single reproductive event or breeding season.2 - 4
Sexual DimorphismObservable physical differences between males and females of the same species (e.g., size, coloration, features).Yes
Lifespan
Sexual MaturityAge at which the individual becomes capable of reproducing for the first time.
12 - 18 Months
Gestation / IncubationDuration from fertilization to birth (mammals) or to hatching (egg-laying species).
30 - 50
Lifespan EstimatedExpected duration of life from birth to natural death under wild conditions.
Males3 - 6 Years
Females4 - 7 Years
Sexual DimorphismPhysical differences in size, coloration, or morphology between males and females of this species.
Males Multi-lang
Males are slightly smaller with more slender tails.
Females Multi-lang
Females are typically more robust, especially when carrying eggs.
Evolutionary AdaptationsInherited traits and behaviors that improve the species' survival and reproduction in its specific environment. Multi-lang
Possesses a highly cryptic color pattern that blends seamlessly into dark, damp soil environments.
Main ThreatsDocumented pressures reducing the population: habitat loss, hunting, disease, climate change, and invasive species. Multi-lang
Threatened by climate change in high-elevation ecosystems and habitat loss due to agricultural expansion.
Interesting FactsSurprising or notable facts that highlight what makes this species unique or ecologically important. Multi-lang
The specific epithet 'pulveriventris' literally translates to 'dusty belly,' referring to the characteristic ventral speckling.