Develops over 7–20 days.
Immature form that undergoes metamorphosis before adulthood.
whitish larvae
Hot and almost no precipitation
parasitic fungi
Heavy rains in summer
Increasing humidity to 80%; culling.
Map
summer mild, +15…+20 °C
cuticle spots
mass accumulation at surface
Warm summer
population aging
Can be used as a marker in breeding.
slow movement
complex
rapid dehydration
infection via feed
desiccation
South and Central America, hot and humid, huge forests
Culling from the breeding stock; standard care.
virus from sick individuals
inbreeding in colony
beauveria or metarhizium spores
Develops in 14–35 days; can destroy the colony in 2 months.
favorable in dry conditions
Introduction of new genetic material; improvement of hygiene.
Removal of the chemical source; fresh air.
favorable if detected early
deformed elytra
very hot and almost no rain
ammonia poisoning
fine meal dust
rains are very rare, almost a desert
amebic infection
congenital
toxic plants
old substrate
infected bacteria
age diag byOther
Warm or hot summer
Palearctic realm
Upcoming birthdays
Lifespan
Superficial.
Airtight containers with fine mesh.
oat flakes
white skin spots
chronic trauma
old age
Affecting multiple organs or the entire body.
Very hot and almost dry
Exclusion of sugars; dry food.
most of Europe and Asia, various forests, steppes and tundra
Warm summer and frequent rains
Introduction of young individuals from another line.
Earliest developmental stage inside an egg or womb.
Lifespan average
water is almost always cold, there may be ice in winter, not hot in summer
gnawed larvae
introduction of infected individuals
mold on body
Adding beeswax or vegetable oils to the feed.
Change of breeding line.
genetic factor
increased nocturnal activity
Develops over 5–10 days.
nutrient deficiency
Freshwater
very cold, lots of snow and ice
starvation
condensation in container
fatal
Peak losses on days 3–7.
Development cycle of 60 to 180 days instead of 90.
Antiseptic measures; dryness.
dull cuticle
Complete disinfection and restart.
Colony monitoring; culling if desired.
Rapid course, 3–7 days.
hereditary defect
cm
undeveloped pupae
Reducing humidity below 60%; ventilation.
turns
ultraviolet radiation
Low humidity and good ventilation.
transport stress
Lifelong in older individuals.
Dry conditions; isolation.
Fat
Share
favorable short term
Prolonged course
behavior change
long transport
Avoid biological preparations near the culture.
Elders
Bro
Long-lasting or recurring health condition persisting over an extended period.
spinal muscular atrophy
spirochetosis
Death from starvation within 7–12 days.
Chronic; leads to death within 15–30 days.
birth date
Develops within 10–20 days under crowding; chronic course in colonies.
white or red eyes
Career from 7 to 15 months. Dwarf hamsters, voles, field crickets celebrate their birthday twice a month
The basics
cautious
Immediate isolation; complete replacement of all contents.
Spread over 5–10 days.
poor nutrition
low hatch rate
dwarfism mutation
virus
beauveria bassiana
cardiac necrosis
favorable
Low humidity (<50%); removal of sick animals; ventilation.
lots of rain, summer not hot
Mass
cold winter, lots of coniferous trees: spruce, pine
laboulbeniales
Symptoms within 4–12 hours; death within 24–48 hours.
Gestation
Death within 24–72 hours if not assisted.
small mites on body
access of mice or rats
Always hot
May last for days.
On the map
Manifests immediately after molting; chronic course.
Female ♀
frequent molting
Body temperature
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.
bloody diarrhea
Complete destruction of the colony.
water deficiency
depends on breeding goal
birth year
bacterial endocarditis
Replacement with young sires.
lots of rain, summer from warm to very hot
normal appearance
terrestrial habitat, land surface outside water
sq mm
pesticide poisoning
chronic toxins
Indicates a minor health issue that typically resolves with minimal intervention.
until the celebration
What if eaten?
much snow in winter, cold
old bran
wheat bran
spontaneous mutation
5–12 days.
opening of spiracles
insects from nature
digestive disorder
world of Afrotropics
Death within 1–4 days.
Maintaining temperature 24–28°C.
Gradual feed change over 7–10 days.
white fibers in intestine
lack of ventilation
white plaque in intestines
chemical vapors
Always hot and wet
Warm summer with almost no rain
hypothermia
high humidity and mold
frequent infections
How are they built?
lack of egg laying
Reducing stocking density; separation by age; environmental enrichment.
mm
ml
My age?
Complete replacement and calcination of the substrate; maintaining dryness.
Serious or life-threatening health condition requiring urgent attention.
Soft feed; culling.
body curvature
hyperactivity then lethargy
Constant presence.
Southeast Asia and islands, always hot and humid
Symptoms appear within 2–5 days after molting.
Progresses over 10–20 days.
Rabbits, falcons, red-eared turtles hang out for 6-9 years and party on their birthday four times a year
slow growth
stress
Feed change; thermal treatment of the substrate.
very hot and almost no precipitation
white or pink mycelium
Antibacterial measures; isolation.
rickettsiosis
Removal of all sources of mold; use only dry sterile feeds.
Protection from UV radiation.
North America and Greenland, from tundra to forests
egg
Rapid course — death in 4–8 days.
sticking to walls
kg
body tremor
Replacement of males with healthy ones from another line.
bluish sheen
Hermetic storage; traps outside the container.
m
liquid feces
g
t
refusal to eat
hot Africa south of the desert, many savannas and forests
depends on timely intervention
very cold, short summer, almost no trees, lots of moss
How old you would be if you lived as {name}
summer from pleasant to very hot
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.
swollen body
Elimination of possible carriers.
eye color mutation
attraction to smell
Warm or hot summer and rains
white inclusions
Immediate cooling to 25–27°C; humidification of the air.
summer warm and almost no rain
Southeast Asia and islands, always hot and humid
systemic
death from dehydration
heredity along the line
Sex
wet substrate
diseases symptoms pigment absence
summer very hot, dry, lots of grass
insect salmonellosis
Removal of all vegetables; providing only dry feed for 2 weeks.
sudden diet change
microsporidia mixed etiology
accumulation of excreta
Begins 7–14 days after crowding; can lead to loss of 30–70% of the population.
Truly long lives: 40-100 years. Bowhead whales, albatrosses, giant tortoises recall their birthday at most once a year
Gradual decline over 4–6 months.
mixed bacterial-fungal infection
salivary gland disease
sarcophagid flies
airborne spores
reduced egg count
Careful mechanical release; increase humidity to 80%.
Exclusion of animal protein; thermal processing of feeds.
unfavorable without radical measures
beauveria infection
More:
Tundra
Isolation; supportive care.
Very cold winter and hot summer
abnormal growth rate
moderate
Juvenile stage following larval metamorphosis but not yet adult.
dry brittle cuticle
summer warm, rains frequent
Sterilization of all material.
Manifests in every generation.
Generation loss in 14–21 days.
irritation itching
Reduction of humidity; improvement of ventilation.
red spot disease
white coating
Mature, fully developed individual capable of reproduction.
Severe course 10–30 days.
Cold sea
toxins in feed or water
Pets
Indomalayan realm
Indomalayan realm
delayed development
Involuntary shaking or trembling of the body.
bacterial hemolymph infection
Traps and sealing.
white body
Find an animal or breed...
Cleaning and dry regimen.
penicillium
Complete liquidation of the colony and start over.
terrestrial forest
Flooded grasslands
inability to fly
red hemolymph
Keeping in the dark; culling.
2–6 days.
fresh vegetables and fruits
Litter size
5–15 days.
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?
rotten vegetables
Chronic course 20–60 days; mild — asymptomatic; severe — emaciation.
common diseases
°C
Not specified
nutrition forbidden name meat products
all seas and oceans
eating feces
Rest, optimal temperature, fresh feed.
Progresses within 5–12 days.
viral agent
mass mortality
Mild course — recovery in 1–2 days with hydration; severe — mass mortality in 3–5 days.
Very cold
if born as {name}
water is almost always warm, even in winter you can swim, very hot in summer
Protein
direct sunlight
Stable humidity 70%; isolation.
gregarina polymorpha
Neotropical realm
pericardial cell pathology
multiple symptoms
citrus fruits
incorrect segment number
Water
unfavorable after damage
heart function disorder
mucoid mycosis
trichinellosis, trichinella spiralis
rare cleaning
age diag byColoration
Warm sea
{name} birthday
Develops within 14–30 days.
Link copied
moist environment
Death from dehydration within 3–7 days.
breathing problems
cannibalism
viral transmission
shortened antennae
draft
environmental pollution
lethargy after exposure
Rapid deterioration.
comfortable summer, +20…+25 °C
severe
Frequently observed or widespread in the species or population.
Separation by size; increase in area; constant availability of feed and shelters.
absence of feed more than 14 days
pathogenic bacteria in feed
age as {name}
parasitoid wasp infestation
Dry air and clean substrate.
Health issue of intermediate seriousness, neither mild nor life-threatening.
combination of factors
Marine world
population decline
injury and contamination
flagellata
Freezing and sifting of feed.
Temperate mixed forest
Very hot and dry
spirochetes
7–14 days.
Condition that typically results in death without intervention.
This is me
sugar containing feeds
Separate breeding or culling.
Steppe
coating on body
selection for size
small moving dots
complete paralysis
very hot during the day, cold at night, almost no rain
bacterial septicemia
10–20 days.
Taiga
Asexual
Death within 24–72 hours.
shortened legs
Chronic condition.
nacl
aspergillosis
When you would have been born if you lived as {name}
Gradual increase in temperature to 25°C; avoid sudden changes.
essential oils
corn and potato
Daddies
summer not hot, from +15 to +25 °C
inability to feed
Hermaphrodite ⚥
Increasing humidity to 65–75%; providing vegetables with high water content; moistening the substrate.
genetic diseases
3–8 days.
Death within 48–96 hours.
Regular cleaning.
Survive up to 30–60 days; upon resumption of feeding, they recover within 7 days.
nocturnal restlessness
will celebrate their {n} birthday
organ diseases
dark hemolymph
Removal of sick animals; disinfection of containers with 70% alcohol.
dermatophytosis
Litters lifetime count
hemolymph flow disruption
unfavorable without intervention
very hot and very humid all year round, rain almost every day
Culling of the line.
South and Central America, hot and humid, huge forests
mattesia
constant light
weak unexpanded wings
Complete isolation of the culture; fine-mesh nets.
infection
very heavy rains in summer, almost no precipitation in winter
Providing soft or liquid feed.
systemic emaciation
Chronic contamination for 14–40 days.
genetic defect
Slow spread.
mantle trauma
uneven sizes
classical swine fever
entomopathogenic fungi
Gradual increase over 30–60 days.
summer warm, winter not very cold
temperature for housing
cuticle cracks
cuticle pigmentation defect
Cool summer
Gremllins
genetic failure
Filters
poultry feed
mechanical trauma
Develops within 7–14 days.
infected lines
genetic susceptibility
Acute course — death within 1–4 days; mass outbreak.
rains almost always, very humid
Rapid loss of colony within 1–3 nights.
unfavorable during outbreak
Wanderers
Recovery within 7–14 days.
Change of substrate and conditions.
world of Australasia
Jubilee = every 10th birthday
Rapid destruction of the colony.
Minimum space
insect iridescent virus
Exclusion of all fresh vegetables for 3 weeks; only dry bran.
pelleted feed
Business sausages
fruit and berry
heat stress susceptibility
helminths
larvae on body
purulent foci
diarrhea
Colony hygiene.
osmoregulation disorder
poor hygiene
genetic anomaly
How do they behave?
abnormal color
Introduction of outbreeding.
Carbohydrates
hard mummies
hemolymph acidosis
Develops over 20–40 days.
death
Death within 2–5 days.
water is cool or warm, cold in winter, comfortable to swim in summer
Chronic with constant exposure.
floating tail syndrome
Death within 1–3 days.
all rivers and lakes
Isolation of affected individuals; soft substrate; increased humidity.
body twisting
chronic starvation
soft exoskeleton
serratia marcescens infection
Lots of rain and cool summer
Hot steppe
{name} jubilee
Immediate removal of all sick; sterilization of containers with steam or alcohol; transition to dry food.
Summer from cool to warm
hepatic abscess
transport
Old-timers
deep substrate
Rascals
milk dairy
paralytic virus disease
Complete substrate replacement; drying; addition of dry feeds.
hot Africa south of the desert, many savannas and forests
Death from exhaustion within 10–20 days.
Disease caused by pathogenic microorganisms: bacteria, viruses, fungi, or protozoa.
soft cuticle
Hygiene; injury prevention; dry regimen.
Where are they found?
all rivers and lakes
Symptoms within 24–72 hours.
dropsy
Chronic course; flare-ups every 14–30 days.
wound
fat body necrosis
high mortality
10–25 days.
Palearctic realm
Heals after the next molt (10–20 days).
My weight?
Non-stop carnival: they only live a few days. Mayflies, rotifers, midges celebrate their birthday more than twice a day
Constant humidity above 75%.
parasites and bacteria
Develops over 5–15 days.
Potential Habitat
Very hot summer
In husbandry
On the go from 1.3 to 3.5 years. Forest mice, anoles, rainbow fish party on their birthday once a month
Use of coarse bran fraction; regular wet cleaning.
Sifting through a fine sieve; substrate replacement; reducing humidity to 50%.
Freezing feed at -20°C for 48 hours before use.
oats
Chronic presence.
muscardine fungal infection
body shape anomalies
infected larvae
Develops within 15–40 days.
No results found
favorable after cleaning
Drying the substrate; adding dry absorbents.
unfavorable for reproduction
general depression
neurological diseases
unfavorable for breeding
hind leg paralysis
red streaking
Culling of mutant individuals from breeding is recommended; improvement of housing conditions and diversification of the genetic pool.
How similar?
Chronic or acute course.
Destruction of the entire infected colony; prolonged quarantine of new stock.
Male ♂
bloating
diseases symptoms reduced mobility
Rapid course 3–8 days.
On the go from 3.5 to 6 years. Hedgehogs, crows, lizards treat themselves to birthday snacks 6 times a year
dysecdysis
Very dry
Neither
short leg mutation
continuous edge movement
candidiasis
penetration into culture
Manifests at the pupal stage; in mild cases — survival 20–30 days; in severe cases — death within 5–10 days.
forests on land — tropical, temperate, boreal
Freshwater
fragile integument
Gradual introduction of feed (bran, vegetables); avoid overfeeding.
parasitic diseases
Hygiene; injury prevention.
Chronic; may lead to colony collapse.
increased light sensitivity
Always very wet
loss of fertility
darkened body
selective effect
Change of feed base.
Theoretical lifespan
Stars
Link copied
fusarium solani
white body patches
loss of light response
terrestrial
Death during molting within 1–3 days.
deformities
Progresses with each molt.
early death
inbreeding
Destruction of affected individuals; disinfection.
Where do they take shelter?
Warm summer and lots of rain
infectious diseases
Disorder caused by inherited or mutation-based factors.
very hot all year round, frequent rains, but sometimes dry
unfavorable without humidity control
acarid mites
Lifespan maximum
20–45 days.
Complete disinfection of the substrate; culling.
Develops within 14–40 days.
Sand grain
lots of rain, warm and pleasant summer
improves
Changing the feed to sterile.
Complete substrate replacement; heat treatment (60°C for 30 min); feeding only dry food.
Observations
nosema
moderate
vegetable waste
Worker
tenebrio molitor iridescent virus
birth time
favorable by eliminating source
Dogs, dolphins, lynx hang out for 9-25 years and party on their birthday three times a year
Transition to high-protein feed (dry milk, fish meal); reduction of carbohydrates.
dirty substrate
When your next jubilee falls in {name} life years
Full substrate replacement; ventilation; density reduction.
Human
hereditary predisposition piebald lines
feed residues
days
Disease affecting specific internal organs or organ systems.
impaired hemolymph circulation
adult beetle
mummification
Providing constant access to moisture.
unfavorable without protection
Health
contaminated animal feed
About health
Drying; substrate replacement; ventilation.
wet contaminated substrate
When your next birthday would fall if you lived as {name}
absence of limbs
Gradual feeding with high-quality protein.
reddish tint
Increase humidity; careful assistance if stuck.
results
Spreads within 4–10 days; can destroy the colony.
Does not affect survival.
Elimination of animal protein.
chronic
neural helminthiasis
Upcoming jubilees
pinkish coating
mo
little precipitation in winter, more in summer
all seas and oceans
Selection of the desired line; standard conditions.
selective mutation
reproductive issues
Manifests upon emergence of the imago.
At 10°C and below — death within 7–14 days.
sex gene mutation
low egg production
accumulation at ventilation
Winter with snow
entomopathogenic bacteremia
Height
Isolation and culling; maintaining optimal temperature 25–28°C and humidity 60–70%.
loss of smell response
Improved ventilation; low-protein diet.
low air humidity
chronic diarrhea
Isolation; elimination of the toxin source.
black spots on abdomen
Symptoms within 5–10 days.
incorrect substrate
Lifelong; does not significantly affect survival.
Discontinuation of predatory mite use.
Drying and replacement of the substrate.
nymph
Chronic course
What do they look like?
Maturity
emergence (insects)
vitamin deficiency
end of lifespan
How do they live?
fertilization / egg laying
birth / hatching
metamorphosis / end of larval stage
use as biocontrol
end of acceleration
Death of pupae.
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metarhizium anisopliae
fly larvae in body
very cold winter and very hot summer
old feed
Lifelong condition; mild course allows survival up to 60–90 days.
reduced activity
Nearctic realm
Sterilization of everything.
fecal oral route
small spores in hemolymph
Wingspan
islands and part of Australia, many unusual animals and plants
gene mutation
presence in soil
Lifelong condition.
age
Living from 25 to 40 years. Orangutans, bald eagles, African elephants celebrate their birthday twice a year
pupa
Enrichment of feed with greens and vitamin supplements.
Increasing calcium and protein content in feed; culling.
bacillus thuringiensis
lots of rain, cool summer, snow in winter
Low precipitation in winter
Legendary longevity: over 100 years. Galapagos tortoises, Greenland sharks, ocean quahogs celebrate with family once every 4 years
Progresses over 5–15 days.
unpleasant odor
entamoeba meningoencephalitis
weight loss
Present at birth due to genetic or developmental factors.
Taxons
female infertility
antennopathy
cold, short summer, almost no trees
difficult defecation
tissue destruction
age
May last 3–6 months.
irritation
Quarantine and destruction.
coccidia
high temperature
Close
was
Marine world
high density humidity
Neotropical realm
fly access to container
14–30 days.
chronic anorexia
contact
Death within 7–12 days.
stuck old cuticle
Temperate sea
temperature below 15c
Rapid death.
lots of grass, few trees, rains are rare
d
Mosquitoes, fruit flies, small crustaceans hustle for up to 7 months and throw a birthday party every week
color selection
lack of offspring
islands and part of Australia, many unusual animals and plants
summer very hot, above +25…+30 °C
Removal of affected animals; sterilization of substrate; use of dry feed only.
Nearctic realm
age diag bySize
Gradual.
North America and Greenland, from tundra to forests
genetic polymorphism
Observable decrease in normal movement or energy levels.
Pleasant summer
Cold and almost dry
world of Afrotropics
entomopathogenic bacteria
pale skin
mild
pseudomonosis
up to ~3 grams, up to 3 centimeters
white mutation
weak immunity
black growths on cuticle
imago
yr
Maintenance of optimal conditions.
Transfer to darkness or a 12-hour light day.
body deformity
Develops in 20–40 days; chronic course.
esophagitis
Improving ventilation; reducing bedding depth.
thin larvae
oat flour
Tundra
How do they breed?
crop ulceration
dysecdysis congenita
complete immobility
What do they eat?
dry and cold almost all year round
Strict culling; complete disinfection.
onion garlic and hot pepper
Where do they live?
Manifests from the moment of hatching; mild course — survive to imago; severe — high mortality at the larval stage within 7–14 days.
hereditary trait
depends on damage degree
larva
water often floods the land, lots of grass
metarhizium anisopliae mycosis
rotten smell
Disease affecting the nervous system, brain, or nerves.
megaselia scalaris
feed contamination
Destruction of the entire colony; sterilization of equipment; starting with new healthy individuals.
generalized edema
feed deficiency
most of Europe and Asia, various forests, steppes and tundra
Gamers
Indicates recovery is likely when appropriate husbandry is provided.
Cool summer and lots of rain
excess carbohydrates diet
Often leads to death at the pupal stage.
bacterial disease
wk
My size?
temperament
Moulting takes 5–12 days instead of 1–2.
swap
room treatment
Reducing humidity to 40–50%; removal of affected areas; treatment of surfaces with disinfectants.
favorable if not reached critical point
mold in feed
high humidity in heat
Calcium
wasps instead of beetles
unfavorable if temperature persisted long
celebrated their {n} birthday
Illness caused by parasites such as worms, protozoa, or ectoparasites.
unfavorable
Vitamin D3
world of Australasia
depends on colony scale
Chronic decrease in productivity.
Change in photoperiod and temperature.
mild mycosis
summer warm, many oaks, birches, maples
Length
torn bodies
Detected 30–45 days after mating.
Develops over 10–20 days; severe course — death within a week.
fat body disease
sharp edges of equipment
◉{N} more on tap
larva
young insect