The western mastiff bat is one of the smallest bats in the world. This mammal lives in arid regions of western North America and hunts insects at night.
The western pipistrelle bat differs from related species by its very small size and light fur coloration. It is beneficial to nature because it destroys a large number of harmful insects in desert areas.
homogamy, reproduction always with fertilization, no alternation of generations
Worker
birth time
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
echolocation
days
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
About health
When your next birthday would fall if you lived as {name}
Repro interval
results
aerial
summer warm, winter not very cold
Colors
Sex
very hot and almost no rain
Upcoming jubilees
Gremllins
mo
rains are very rare, almost a desert
Trophic type
Filters
Upcoming birthdays
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
nocturnal butterflies and moths
nest on the ground
Desert and dry shrubs
young are born live on land, not hatched from eggs or roe
in hollows and caves
Very hot and almost dry
Age (from birth to death)
Wanderers
Feeding occurs in open air space above ground or water.
Wings size
Jubilee = every 10th birthday
dry, cold winter, lots of grass, few trees
Ears size
Earliest developmental stage inside an egg or womb.
Business sausages
Lifespan average
nest located directly on the ground surface on land, only the mother provides parental care for the offspring
in a terrestrial nest
Regeneration
live birth
What do they look like?
Maturity
emergence (insects)
moths
end of lifespan
Wings color
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...
live mosquitoes and midges
Mature, fully developed individual capable of reproduction.
Actively hunting and capturing live prey.
flight
Pets
Nearctic realm
terrestrial shrubland
{name} jubilee
terrestrial shrub habitats — maquis, chaparral, bush
cm
Old-timers
Find an animal or breed...
small beetles
Wingspan
desert and semi-desert
turns
Rascals
terrestrial forest
Ears count
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
mosquitoes
°C
Not specified
arid
Where are they found?
Species lacks any fixed or lasting shelter structure.
Legendary longevity: over 100 years. Galapagos tortoises, Greenland sharks, ocean quahogs celebrate with family once every 4 years
Offspring
Elders
Bro
normal sexual
Taxons
if born as {name}
moths
Wings count
beetles
age
birth date
no permanent shelter
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
The basics
hibernation
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
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
mosquitoes
Mass
Mosquitoes, fruit flies, small crustaceans hustle for up to 7 months and throw a birthday party every week
live flies, horseflies, dipterans
land
{name} birthday
Nearctic realm
No results found
North America and Greenland, from tundra to forests
On the map
all life stages
Female ♀
Cold and almost dry
insectivore
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
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?
Very dry
Neither
from birth to adulthood
live beetles — various species
Young offspring still dependent on parental care.
flies
caring mother
What do they eat?
dry and cold almost all year round
Where do they live?
Immature individual that has not yet reached reproductive maturity.
Ears color
forests on land — tropical, temperate, boreal
flies
Very hot and dry
Duration
This is me
Steppe
Gamers
How are they built?
aerial hunting with echolocation
mm
Theoretical lifespan
arid
ml
Stars
Link copied
My age?
wk
My size?
very hot during the day, cold at night, almost no rain
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?
inhabit and develop on land, outside water bodies
celebrated their {n} birthday
When you would have been born if you lived as {name}
Cold steppe
Daddies
Lifespan maximum
very hot and almost no precipitation
Capturing or collecting food while airborne.
Hermaphrodite ⚥
Grape
8 to 11 grams, 1.5 – 8 centimeters
North America and Greenland, from tundra to forests
embryo
Length
kg
very hot and dry, rare rains, cacti live
Observations
◉{N} more on tap