The Patagonian lancehead snake is a venomous snake from the viper family. It lives in the steppes of southern South America and is considered one of the southernmost venomous snakes in the world.
The Patagonian lancehead snake differs from other vipers by living in cold and dry places. It helps nature by controlling the population of rodents and serving as food for birds of prey.
Immature form that undergoes metamorphosis before adulthood.
Worker
birth time
ambush
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
Coconut
Heat sensing pits count
About health
When your next birthday would fall if you lived as {name}
Repro interval
results
Eyes count
summer warm, winter not very cold
Colors
Sex
Upcoming jubilees
Gremllins
mo
Uses an excavated underground tunnel or chamber for refuge or nesting.
rains are very rare, almost a desert
little precipitation in winter, more in summer
Trophic type
Filters
Upcoming birthdays
Truly long lives: 40-100 years. Bowhead whales, albatrosses, giant tortoises recall their birthday at most once a year
Lifespan
Desert and dry shrubs
rains almost always, very humid
Age (from birth to death)
Wanderers
Fangs count
Jubilee = every 10th birthday
dry, cold winter, lots of grass, few trees
Warm summer and frequent rains
Earliest developmental stage inside an egg or womb.
Business sausages
Lifespan average
summer warm, rains frequent
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
very dry and cold, very little snow and rain
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Mature, fully developed individual capable of reproduction.
Actively hunting and capturing live prey.
from 0.5 to 0.8 kilograms, 0.5 – 1 meter
Pets
{name} jubilee
cm
Old-timers
Find an animal or breed...
desert and semi-desert
turns
Rascals
Cold desert
terrestrial grassland and steppe
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
small birds
tail
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
Elders
small birds — sparrows, tits, hummingbirds
Bro
Taxons
carnivore
if born as {name}
age
Predator remains still and concealed before launching a sudden attack.
birth date
Head size
small mammals — mice, shrews, bats
arid terrestrial biotopes with sparse vegetation
Close
was
Career from 7 to 15 months. Dwarf hamsters, voles, field crickets celebrate their birthday twice a month
The basics
Neotropical realm
Venomous
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
teeth
burrow
Potential Habitat
lots of grass, few trees, rains are rare
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
small mammals
summer very hot, above +25…+30 °C
{name} birthday
No results found
Eyes color
On the map
Pleasant summer
all life stages
Female ♀
Cold and almost dry
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.
Fangs size
birth year
lots of grass, few trees, rains occur
Maturity
venom
steppe
terrestrial habitat, land surface outside water
sq mm
yr
comfortable summer, +20…+25 °C
How similar?
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?
Very dry
Neither
from birth to adulthood
What do they eat?
dry and cold almost all year round
Where do they live?
Immature individual that has not yet reached reproductive maturity.
early young
Hard dental structures used to bite, tear, or scrape food.
Very hot and dry
Duration
This is me
Steppe
Always very wet
Gamers
How are they built?
live lizards
Temperate steppe
mm
Theoretical lifespan
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
lizards
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?
Head color
celebrated their {n} birthday
open grassy spaces — steppes, savannas, prairies
When you would have been born if you lived as {name}
Cold steppe
Daddies
Lifespan maximum
Hermaphrodite ⚥
embryo
Length
kg
very hot and dry, rare rains, cacti live
Observations
◉{N} more on tap