The two-spotted rattlesnake is a small venomous snake with two rows of dark spots along its back. It lives in mountainous areas in southern Arizona and northern Mexico.
The two-spotted rattlesnake differs from other rattlesnakes in its small size and unique pattern of double spots on its back. It helps maintain balance in nature by controlling the population of lizards in mountain forests.
Legendary longevity: over 100 years. Galapagos tortoises, Greenland sharks, ocean quahogs celebrate with family once every 4 years
Immature form that undergoes metamorphosis before adulthood.
Offspring
Worker
Elders
Bro
birth time
vertebrates
ambush
Taxons
carnivore
almost no rain in summer, more precipitation in winter
Heat pits count
if born as {name}
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
Fangs color
Rattle count
age
summer mild, +15…+20 °C
t
When your next jubilee falls in {name} life years
Predator remains still and concealed before launching a sudden attack.
Human
birth date
small mammals — mice, shrews, bats
Close
was
days
Career from 7 to 15 months. Dwarf hamsters, voles, field crickets celebrate their birthday twice a month
Warm summer
The basics
How old you would be if you lived as {name}
Venomous
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.
My weight?
Non-stop carnival: they only live a few days. Mayflies, rotifers, midges celebrate their birthday more than twice a day
adult
Maturity
primary food sources
teeth
Potential Habitat
About health
cool, lots of coniferous trees, snow in winter
When your next birthday would fall if you lived as {name}
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
Repro interval
results
summer warm and almost no rain
Mass
Mosquitoes, fruit flies, small crustaceans hustle for up to 7 months and throw a birthday party every week
summer warm, winter not very cold
Gestation
from 130 grams to 0.5 kilograms, 0.35 – 0.8 meters
Body size
small mammals
Colors
Cool summer
Sex
{name} birthday
Upcoming jubilees
Gremllins
mo
Nearctic realm
No results found
North America and Greenland, from tundra to forests
alpine meadows and arctic tundra on land
Trophic type
Filters
On the map
Pleasant summer
all life stages
Female ♀
Body color
den
Upcoming birthdays
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.
Fangs size
Truly long lives: 40-100 years. Bowhead whales, albatrosses, giant tortoises recall their birthday at most once a year
Lifespan
birth year
Maturity
venom
Age (juvenile)
terrestrial habitat, land surface outside water
Age (from birth to death)
sq mm
yr
comfortable summer, +20…+25 °C
Age (embryo)
Wanderers
How similar?
Fangs count
Jubilee = every 10th birthday
Male ♂
until the celebration
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
infrared vision
What if eaten?
Neither
Earliest developmental stage inside an egg or womb.
animals with backbone
Business sausages
Lifespan average
What do they eat?
Where do they live?
from birth to death
early young
Hard dental structures used to bite, tear, or scrape food.
forests on land — tropical, temperate, boreal
What do they look like?
Maturity
emergence (insects)
end of lifespan
How do they live?
fertilization / egg laying
Produces toxins capable of causing harm when delivered.
How do they behave?
birth / hatching
metamorphosis / end of larval stage
end of acceleration
Share
Duration
Find a pet...
Mature, fully developed individual capable of reproduction.
This is me
Warm summer with almost no rain
Rattle color
Actively hunting and capturing live prey.
Gamers
Pets
How are they built?
live lizards
Nearctic realm
mm
Theoretical lifespan
ml
Stars
Link copied
My age?
wk
My size?
terrestrial
{name} jubilee
Asexual
swap
cm
Temperate coniferous forest
Old-timers
Find an animal or breed...
active predation
lizards
turns
Rabbits, falcons, red-eared turtles hang out for 6-9 years and party on their birthday four times a year
Rascals
Where do they take shelter?
terrestrial forest
Rattle size
celebrated their {n} birthday
When you would have been born if you lived as {name}
Litter size
Daddies
Lifespan maximum
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
whole life
Hermaphrodite ⚥
Where are they found?
North America and Greenland, from tundra to forests
embryo
Zucchini
Length
kg
Summer almost without rain
Observations
◉{N} more on tap