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
Handleyomys rostratus
Long-nosed Rice Rat
(Merriam, 1901)
Detailed Texts Multi-lang
A small to medium-sized cricetid rodent with a distinctive elongated rostrum, grayish-brown dorsal fur, and white underparts.
Added by
Anonymous Curator
Reviewed by
Under Review
Other Names (Global)Regional and multilingual names used for this species across different countries and languages.
Long-nosed Rice RatRatón arrocero trompudo
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).Mammalia
OrderRank below Class. Groups related families sharing common ancestry (e.g., Carnivora, Primates).Rodentia
FamilyRank below Order. Groups closely related genera (e.g., Felidae = cats, Canidae = dogs).Cricetidae
GenusRank just above Species. The first word in the two-part binomial scientific name.Handleyomys
Taxonomic AuthorityThe scientist who first formally described and published this species, followed by the year of publication.(Merriam, 1901)
Record Completeness
93%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.
Omnivore
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 moist tropical and subtropical forests, often associated with disturbed or secondary growth areas.BehaviourDaily activity patterns, movement, territory use, foraging style, and seasonal behavioral changes. Multi-lang
Nocturnal and terrestrial, frequently foraging in dense ground-level vegetation.Social ActivitySocial structure: whether the species is solitary, paired, or colonial; hierarchy and communication. Multi-lang
Solitary, avoiding direct interaction with other individuals outside of mating.Feeding GuildWhat the species eats, how it forages or hunts, and its role as a consumer in the food web. Multi-lang
Omnivore.Trophic Chain DetailsSpecific interactions in local food webs: prey species, predators, competitors, and scavengers. Multi-lang
Omnivorous; diet consists of seeds, fruits, and small invertebrates.Reproductive BehaviourMating strategies, courtship displays, nesting or spawning behavior, and parental care. Multi-lang
Continuous breeding in favourable tropical conditions; multi-annual cycles.Physical Measures
Length (cm)
8.0 - 11.0 cm
Weight (Grams)
30 g - 50 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).No
Lifespan
Sexual MaturityAge at which the individual becomes capable of reproducing for the first time.
2 - 4 Months
Gestation / IncubationDuration from fertilization to birth (mammals) or to hatching (egg-laying species).
25 - 30
Lifespan EstimatedExpected duration of life from birth to natural death under wild conditions.
Males1 - 2 Years
Females1 - 2 Years
Evolutionary AdaptationsInherited traits and behaviors that improve the species' survival and reproduction in its specific environment. Multi-lang
Elongated rostrum potentially adapted for specialized foraging or sensing in leaf litter; nocturnal vision and sensitive tactile whiskers.
Main ThreatsDocumented pressures reducing the population: habitat loss, hunting, disease, climate change, and invasive species. Multi-lang
Habitat loss due to intensive agricultural expansion and deforestation.
Interesting FactsSurprising or notable facts that highlight what makes this species unique or ecologically important. Multi-lang
The genus Handleyomys was named in honor of mammalogist Charles O. Handley Jr.