Buzzi's Silvestersaurus is a marine reptile from the plesiosaur group. It lived about 240 million years ago in the Triassic period and had a long neck and flippers for swimming in ancient seas.
Buzzi's Silvestersaurus differs from other plesiosaurs with its special skull structure and older age. It is important for science because it helps understand how reptiles transitioned from land life to a fully marine lifestyle after the mass extinction.
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
Tail size
Bro
birth time
ambush
Taxons
carnivore
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
age
t
When your next jubilee falls in {name} life years
water is almost always warm, even in winter you can swim, very hot in summer
Predator remains still and concealed before launching a sudden attack.
Human
birth date
Palearctic realm
no permanent shelter
Close
was
days
Career from 7 to 15 months. Dwarf hamsters, voles, field crickets celebrate their birthday twice a month
Marine world
Warm summer
live octopuses, squids
The basics
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.
My weight?
Non-stop carnival: they only live a few days. Mayflies, rotifers, midges celebrate their birthday more than twice a day
adult
Maturity
cephalopods
primary food sources
Potential Habitat
About health
cool, lots of coniferous trees, snow in winter
When your next birthday would fall if you lived as {name}
d
Truck
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
Mass
cold winter, lots of coniferous trees: spruce, pine
Mosquitoes, fruit flies, small crustaceans hustle for up to 7 months and throw a birthday party every week
summer warm, winter not very cold
Colors
Sex
Warm sea
{name} birthday
Upcoming jubilees
Gremllins
mo
Teeth color
live fish
No results found
all seas and oceans
Trophic type
Filters
On the map
Tail count
Pleasant summer
all life stages
Female ♀
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.
Truly long lives: 40-100 years. Bowhead whales, albatrosses, giant tortoises recall their birthday at most once a year
Lifespan
birth year
Maturity
rains almost always, very humid
terrestrial habitat, land surface outside water
sq mm
yr
comfortable summer, +20…+25 °C
most of Europe and Asia, various forests, steppes and tundra
Wanderers
How similar?
Neck size
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
What if eaten?
Neither
Earliest developmental stage inside an egg or womb.
Business sausages
Lifespan average
What do they eat?
open water
Where do they live?
Marine world
early young
forests on land — tropical, temperate, boreal
What do they look like?
Maturity
water often floods the land, lots of grass
emergence (insects)
Flippers color
end of lifespan
How do they live?
fertilization / egg laying
How do they behave?
birth / hatching
metamorphosis / end of larval stage
Temperate mixed forest
fish
end of acceleration
Share
Duration
Find a pet...
Mature, fully developed individual capable of reproduction.
Flippers size
This is me
Actively hunting and capturing live prey.
Always very wet
Gamers
Teeth count
Pets
How are they built?
mm
Theoretical lifespan
ml
Stars
Link copied
My age?
wk
My size?
terrestrial
Taiga
{name} jubilee
Asexual
swap
cm
Temperate coniferous forest
Old-timers
Find an animal or breed...
active predation
Flippers count
Neck color
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?
Warm summer and lots of rain
terrestrial forest
Tail color
Neck count
Flooded grasslands
celebrated their {n} birthday
Teeth size
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
more than 0.35 tons, from 2.5 meters
°C
Not specified
Hermaphrodite ⚥
Where are they found?
all seas and oceans
Species lacks any fixed or lasting shelter structure.
embryo
summer warm, many oaks, birches, maples
Length
kg
lots of rain, warm and pleasant summer
Observations
◉{N} more on tap