The gray slender mouse opossum is a small marsupial mammal with gray fur and a very long tail. It lives in trees in the forests of eastern Brazil and feeds at night.
The gray slender mouse opossum differs from related species by its slimmer body and gray fur without bright markings. It helps the forest ecosystem by eating insects and serving as prey for predators.
homogamy, reproduction always with fertilization, no alternation of generations
Immature form that undergoes metamorphosis before adulthood.
Worker
Tail size
birth time
breeding
Dogs, dolphins, lynx hang out for 9-25 years and party on their birthday three times a year
m
Map
will celebrate their {n} birthday
g
t
When your next jubilee falls in {name} life years
Human
Inhabits dense tree-covered areas with closed canopy.
days
South and Central America, hot and humid, huge forests
Warm summer
How old you would be if you lived as {name}
Theoretical maximum lifespan estimated from the Dynamic Energy Budget (DEB) mathematical model. This value reflects a biological potential derived from metabolic parameters, not from direct observation — real recorded lifespans are often significantly shorter.
adult
Maturity
South and Central America, hot and humid, huge forests
24 to 38 grams, 10 – 25 centimeters
insects
About health
When your next birthday would fall if you lived as {name}
Repro interval
results
summer warm, winter not very cold
Sex
Upcoming jubilees
Gremllins
mo
hot, rains in summer, little precipitation in winter
little precipitation in winter, more in summer
Trophic type
Filters
always hot and humid, huge trees and vines
Upcoming birthdays
Breeding structure built or used for laying eggs and raising offspring.
nest inside a tree trunk or in a cave/crevice
eggs, roe or offspring develop in a nest built on the ground or close to it
Truly long lives: 40-100 years. Bowhead whales, albatrosses, giant tortoises recall their birthday at most once a year
Lifespan
rains almost always, very humid
in hollows and caves
Age (from birth to death)
Hot, little precipitation in winter
Wanderers
world of Australasia
Jubilee = every 10th birthday
Warm summer and frequent rains
Earliest developmental stage inside an egg or womb.
Business sausages
fruits
Lifespan average
in a terrestrial nest
young after fast growth
Regeneration
Juvenile stage following larval metamorphosis but not yet adult.
summer warm, rains frequent
What do they look like?
Maturity
emergence (insects)
in the pouch or mouth
end of lifespan
How do they live?
fertilization / egg laying
How do they behave?
birth / hatching
metamorphosis / end of larval stage
end of acceleration
Share
Find a pet...
Mature, fully developed individual capable of reproduction.
Actively hunting and capturing live prey.
Pets
terrestrial shrubland
Feeding occurs primarily on land or in vegetation.
{name} jubilee
terrestrial shrub habitats — maquis, chaparral, bush
cm
Old-timers
Find an animal or breed...
turns
Rascals
terrestrial forest
fruits
Tail color
Forages on tree limbs or woody stems within vegetation.
Litter size
Map data sources: Ecosystem classification — IUCN Global Ecosystem Typology (Keith et al., 2022), indicative distribution maps Keith et al. (2020), https://doi.org/10.5281/zenodo.3546513; Large Marine Ecosystems — NOAA LME Program; Bathymetry — GEBCO Bathymetric Compilation Group (2026), GEBCO_2026 Grid, https://doi.org/10.5285/4f68d5c7-45eb-f999-e063-7086abc036fa; Climate data — Generated using Copernicus Climate Change Service information; Species occurrence data — GBIF.org, Derived dataset "all animals", https://zveriki.com/dataset/dataset.tsv; Terrestrial ecoregions — RESOLVE Ecoregions 2017 (Dinerstein et al., 2017), CC BY 4.0
How to care for them?
Living from 25 to 40 years. Orangutans, bald eagles, African elephants celebrate their birthday twice a year
°C
Not specified
Actively searching habitats to locate food items.
with mother
Where are they found?
Low precipitation in winter
Legendary longevity: over 100 years. Galapagos tortoises, Greenland sharks, ocean quahogs celebrate with family once every 4 years
Offspring
Tropical moist forest
Elders
Bro
small vertebrates without specifying the group
normal sexual
Taxons
seeds, berries, fruits
if born as {name}
spiders
Foraging takes place among trees and woody vegetation.
omnivore
age
birth date
rest
Fur color
Close
was
Career from 7 to 15 months. Dwarf hamsters, voles, field crickets celebrate their birthday twice a month
nocturnal
The basics
climbing
Neotropical realm
My weight?
Non-stop carnival: they only live a few days. Mayflies, rotifers, midges celebrate their birthday more than twice a day
primary food sources
Neotropical realm
Potential Habitat
Very hot summer
d
In husbandry
On the go from 1.3 to 3.5 years. Forest mice, anoles, rainbow fish party on their birthday once a month
Mass
Mosquitoes, fruit flies, small crustaceans hustle for up to 7 months and throw a birthday party every week
terrestrial
islands and part of Australia, many unusual animals and plants
land
summer very hot, above +25…+30 °C
{name} birthday
twigs
Always hot
No results found
Eyes color
On the map
fry develop in the pouch or mouth of a parent on land
Female ♀
all life stages
forages for food on trees at night
Map data sources: Ecosystem classification — IUCN Global Ecosystem Typology (Keith et al., 2022), indicative distribution maps Keith et al. (2020), https://doi.org/10.5281/zenodo.3546513; Large Marine Ecosystems — NOAA LME Program; Bathymetry — GEBCO Bathymetric Compilation Group (2026), GEBCO_2026 Grid, https://doi.org/10.5285/4f68d5c7-45eb-f999-e063-7086abc036fa; Climate data — Generated using Copernicus Climate Change Service information; Species occurrence data — GBIF.org, Derived dataset "all animals", https://zveriki.com/dataset/dataset.tsv; Terrestrial ecoregions — RESOLVE Ecoregions 2017 (Dinerstein et al., 2017), CC BY 4.0
Potential habitat modelled from GBIF occurrence data. Map © Zveriki.com, licensed under CC BY 4.0.
birth year
Shelter used specifically for reproduction or nesting.
Maturity
Skin color
terrestrial habitat, land surface outside water
sq mm
yr
protection from sun
How similar?
Male ♂
until the celebration
baby / chick
age as {name}
How do they breed?
On the go from 3.5 to 6 years. Hedgehogs, crows, lizards treat themselves to birthday snacks 6 times a year
What if eaten?
spiders
Neither
Moving up vertical surfaces like trunks or rocks to reach food.
from birth to adulthood
Young offspring still dependent on parental care.
nest
What do they eat?
forests
Where do they live?
Immature individual that has not yet reached reproductive maturity.
Ears color
early young
forests on land — tropical, temperate, boreal
branch
small vertebrates
Duration
live insects
This is me
Foraging activity occurs primarily during nighttime hours.
small vertebrates
Always very wet
Gamers
the mother carries the baby in a pouch or mouth on land
How are they built?
mm
Theoretical lifespan
ml
Stars
Link copied
My age?
wk
My size?
live spiders — arachnids of all sizes
terrestrial
Asexual
swap
active predation
Rabbits, falcons, red-eared turtles hang out for 6-9 years and party on their birthday four times a year
Where do they take shelter?
Warm summer and lots of rain
inhabit and develop on land, outside water bodies
celebrated their {n} birthday
When you would have been born if you lived as {name}
very hot all year round, frequent rains, but sometimes dry
Daddies
Lifespan maximum
foraging
Hermaphrodite ⚥
Tomato
embryo
Length
kg
lots of rain, warm and pleasant summer
arboreal
Observations
◉{N} more on tap