The water opossum is the only marsupial mammal that swims well and lives near water. It has webbed hind feet, a long tail, and a special pouch in females that does not let water in.
The water opossum differs from other opossums with webbed feet, hairless tail, and waterproof pouch. It is important for nature because it regulates the population of small aquatic animals in rivers and streams.
meadows, prairies, forb glades on land
Worker
Tail size
birth time
Submerges underwater to reach prey or food at depth.
aquatic insects
breeding
Heavy rains in summer
live adult frogs and toads
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
very hot and very humid all year round, rain almost every day
days
South and Central America, hot and humid, huge forests
How old you would be if you lived as {name}
crustaceans
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.
small planktonic crustaceans — copepods, krill
very heavy rains in summer, almost no precipitation in winter
adult
Maturity
fish of small size
South and Central America, hot and humid, huge forests
Coconut
invertebrates
About health
milk
When your next birthday would fall if you lived as {name}
nest built on land near a river, lake, pond or swamp
Repro interval
results
Colors
Sex
Upcoming jubilees
Gremllins
diving
mo
Uses an excavated underground tunnel or chamber for refuge or nesting.
Trophic type
all living animals without backbone
Filters
small fish
Pouch size
Tail count
in fresh water
always hot and humid, huge trees and vines
Upcoming birthdays
standing fresh waters — lakes, ponds, oxbow lakes
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
in a burrow
rains almost always, very humid
Age (juvenile)
Age (from birth to death)
Age (embryo)
Wanderers
Jubilee = every 10th birthday
Earliest developmental stage inside an egg or womb.
Business sausages
Lifespan average
in a terrestrial nest
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
swampy freshwater biotopes — peat bogs, marshes, river mangroves
Find a pet...
Mature, fully developed individual capable of reproduction.
Pouch count
nest hidden in an underground burrow
Freshwater
from 0.5 to 0.8 kilograms, 0.5 – 1 meter
Pets
all rivers and lakes
{name} jubilee
paw
cm
Old-timers
Find an animal or breed...
turns
Rascals
terrestrial forest
terrestrial herbaceous
Tail color
drink mother's milk in childhood
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?
nest hidden in an underground burrow, only the mother provides parental care for the offspring
all rivers and lakes
Describes food handling or digging performed with the forelimbs.
insects living in water or near water — mayflies, caddisflies, stoneflies
Legendary longevity: over 100 years. Galapagos tortoises, Greenland sharks, ocean quahogs celebrate with family once every 4 years
caring mother
Offspring
Tropical moist forest
Elders
Bro
lakes and ponds
freshwater marsh and wetlands
Taxons
carnivore
if born as {name}
age
birth date
rest
Close
was
Career from 7 to 15 months. Dwarf hamsters, voles, field crickets celebrate their birthday twice a month
The basics
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
Hind feet count
burrow
after transformation until death
Potential Habitat
diving and foraging with paws
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
Gestation
land
{name} birthday
Hind feet size
aquatic insects
Always hot
No results found
Hot with heavy summer rains
On the map
fry develop in the pouch or mouth of a parent on land
crustaceans
all life stages
Female ♀
Body color
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
caring mother
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?
Neither
from birth to adulthood
Young offspring still dependent on parental care.
What do they eat?
Where do they live?
Immature individual that has not yet reached reproductive maturity.
forests on land — tropical, temperate, boreal
Freshwater
Duration
frogs
Always hot and wet
This is me
freshwater
Always very wet
Gamers
the mother carries the baby in a pouch or mouth on land
hot, heavy rains in summer, little precipitation in winter
small fish
How are they built?
frogs and toads
mm
Theoretical lifespan
ml
Stars
Link copied
My age?
wk
My size?
Asexual
nest near fresh water, only the mother shows parental care for the offspring
swap
freshwater environment — rivers, lakes, ponds, swamps
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?
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
Pouch
Hermaphrodite ⚥
embryo
Length
kg
Observations
◉{N} more on tap