The black-wristed deer mouse is a small rodent with dark markings on its paws. It lives only in the montane cloud forests of one region in southern Mexico.
The species is found only on one mountain ridge in Mexico. It helps disperse plant seeds and serves as food for snakes and birds.
meadows, prairies, forb glades on land
homogamy, reproduction always with fertilization, no alternation of generations
Worker
Tail size
birth time
Describes the act of excavating soil or substrate to locate or access food.
breeding
Hot and almost no precipitation
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
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
plants
insects
About health
milk
Searches for food on or among rocks and stony surfaces.
When your next birthday would fall if you lived as {name}
Repro interval
results
summer warm, winter not very cold
Colors
Sex
Upcoming jubilees
Gremllins
mo
hot, rains in summer, little precipitation in winter
rains are very rare, almost a desert
conifer cones
little precipitation in winter, more in summer
alpine meadows and arctic tundra on land
Trophic type
Filters
summer very hot, dry, lots of grass
Warm winter with almost no precipitation
always hot and humid, huge trees and vines
Upcoming birthdays
Breeding structure built or used for laying eggs and raising offspring.
eggs, roe or offspring develop in a nest built on the ground or close to it
nest inside a tree trunk or in a cave/crevice
Truly long lives: 40-100 years. Bowhead whales, albatrosses, giant tortoises recall their birthday at most once a year
Lifespan
leaf
Seeds
nest on the ground
Desert and dry shrubs
rains almost always, very humid
young are born live on land, not hatched from eggs or roe
in hollows and caves
Age (juvenile)
Age (from birth to death)
cones of coniferous trees with seeds
rock
Hot, little precipitation in winter
Age (embryo)
Wanderers
Food items are collected from exposed outer surfaces of substrates.
Jubilee = every 10th birthday
dry, cold winter, lots of grass, few trees
Earliest developmental stage inside an egg or womb.
Business sausages
fruits
Lifespan average
nest located directly on the ground surface on land, only the mother provides parental care for the offspring
greenery
in a terrestrial nest
Whiskers size
live birth
What do they look like?
Maturity
emergence (insects)
end of lifespan
hot, there is a dry season, trees shed their leaves
How do they live?
fertilization / egg laying
How do they behave?
birth / hatching
metamorphosis / end of larval stage
end of acceleration
Share
seeds
Find a pet...
Mature, fully developed individual capable of reproduction.
Actively hunting and capturing live prey.
digging
Pets
Primary oral structure used to seize, manipulate, or ingest food.
terrestrial shrubland
Tropical dry broadleaf forest
Hot steppe
Feeding occurs primarily on land or in vegetation.
{name} jubilee
paw
terrestrial shrub habitats — maquis, chaparral, bush
cm
Old-timers
Find an animal or breed...
mouth
desert and semi-desert
turns
Rascals
terrestrial forest
terrestrial herbaceous
Tail color
drink mother's milk in childhood
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
alpine and arctic tundra
Actively searching habitats to locate food items.
Where are they found?
38 to 65 grams, 15 – 40 centimeters
Describes food handling or digging performed with the forelimbs.
Whiskers color
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
winter dry and warm
normal sexual
Taxons
seeds, berries, fruits
if born as {name}
Forages within or on the surface of soil or substrate.
Foraging takes place among trees and woody vegetation.
omnivore
age
birth date
arid terrestrial biotopes with sparse vegetation
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
herbivory, feed only on plant food
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
Insects
surface
Tree foraging
primary food sources
Neotropical realm
teeth
after transformation until death
Potential Habitat
lots of grass, few trees, rains are rare
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
Gestation
land
{name} birthday
Food is gathered directly from leaf surfaces.
Nearctic realm
soil
grass
Always hot
No results found
North America and Greenland, from tundra to forests
underground
Eyes color
On the map
Pleasant summer
all life stages
Female ♀
Cold and almost dry
nest located directly on the ground surface on land
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
comfortable summer, +20…+25 °C
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?
Very dry
Neither
Moving up vertical surfaces like trunks or rocks to reach food.
Young offspring still dependent on parental care.
Wrists color
nest
caring mother
What do they eat?
dry and cold almost all year round
Where do they live?
moss
Hard dental structures used to bite, tear, or scrape food.
forests on land — tropical, temperate, boreal
branch
Duration
live insects
This is me
Foraging activity occurs primarily during nighttime hours.
Steppe
Always very wet
Gamers
How are they built?
mm
Theoretical lifespan
ml
Stars
Link copied
My age?
wk
My size?
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
Cold steppe
Daddies
Lifespan maximum
very hot and almost no precipitation
foraging
Hermaphrodite ⚥
embryo
Orange
Length
kg
very hot and dry, rare rains, cacti live
lots of rain, warm and pleasant summer
arboreal
Observations
◉{N} more on tap