Dr. Bob's Animal Health and Information Site

Animal Health Reference

Animal Longevity and Lifespan

Understanding typical lifespan, potential longevity, and historical record ages

Author
Robert L. Linville, DVM
Content review
August 2026

How to Use Lifespan Information

One of the most common questions about an animal is, “How long does this species live?” A single number rarely gives a complete answer. For pet owners, a typical lifespan range is usually more useful than a maximum-record age. For wildlife and zoo species, longevity can differ substantially between free-ranging animals and animals maintained under managed care.

The original version of this page was a collection of maximum or record lifespans from several sources. That historical table has been preserved below because it is interesting and may have reference value, but its individual values have not all been re-verified against current species-specific longevity databases. It should therefore not be used as a clinical prediction of life expectancy.

Selected Current Companion-Animal References

The following examples use current veterinary references that specifically provide typical lifespan or life-expectancy information. They are intended as broad planning ranges, not guarantees for an individual animal.

Selected typical lifespan or life-expectancy ranges
AnimalTypical reference rangeContext
Domestic dogAbout 12–13 years on averageAverage varies substantially with breed and body size.
Rabbit8–12 yearsMerck notes this range for well-cared-for pet rabbits spayed or neutered early in life.
Ferret6–10 yearsTypical pet-ferret lifespan.
Chinchilla4–15 yearsTypical pet-rodent range; longer lifespans can occur.
Guinea pig4–8 yearsTypical pet-rodent range.
Gerbil2.5–4 yearsTypical pet-rodent range.
HamsterAbout 1–3 yearsRange varies by species; Merck lists approximately 1–2 years in its rodent table and 18–36 months for Syrian hamsters.
Mouse1–2 yearsTypical pet-rodent range.
Rat2–3 yearsTypical pet-rodent range.
Pet birdsPotentially 20–80 yearsVery broad group; larger species generally have greater longevity than smaller species.
Desert tortoise60 years or moreReported for captive animals receiving appropriate care.

Cats: a single “expected lifespan” number is especially sensitive to lifestyle and health history. Cornell notes that many cats now reach ages at which 12–14 years is considered older, and healthy individuals may live well beyond that. This page therefore avoids presenting the original “25 years” entry as a typical feline life expectancy.

Historical Longevity Table

This table preserves the values from the original Dr. Bob page. They were originally described as expected maximum lifespans and were largely based on record ages from various sources. During the 2026 review they were not individually revalidated. Treat them as historical longevity observations rather than expected lifespan ranges.

Historical maximum or record longevity values from the original page
AnimalOriginal value (years)
African Grey Parrot73
Amazon Parrot104
American Alligator56
American Box Turtle123
American Newt3
American Toad15
Angleworm15
Anole3
Ant --Queen3
Ant -- Worker1/2
Banksian Cockatoo29.3
Bat24
Bear40
Beaver20
Bee -- Queen5
Bee -- Worker1
Binturong18
Blackbird(redwinged)15.8
Boa Constrictor23
Budgerigar29
Bull28
Bull Frog16
Bull Snake18
Caiman28
Camel50
Canada Goose24.3
Canary24
Canvasback duck22.4
Capybara12
Carp100
Cat25
Chicken14
Chinchilla20
Civet13
Cockatiel35
Common Goldeneye14.3
Congo Eel27
Conure22.5
Cottonmouth Mocassin21
Cow22
Crocodile45
Deer26.8
Dog22
Domestic Pigeon18
Donkey45
Eclectus Parrot30
Egyptian Goose25.5
Elephant70
Fence Lizard4
Ferret12
Flying Squirrel14
Fox14
Galah27.2
Galapagos Land Tortoise193
Gerbil5
Goat15
Golden Hamster4
Gouldian finch14
Grey Cheeked Parrot15
Grey Squirrel20
Grouse (blue)14
Guinea Pig8
Hare10
Hellbender29
Hippopotamus45
Hog18
Horse40
Kangaroo9
Koala8
Leopard Frog6
Lion35
Macaw64
Mallard29
Mongoose12
Mouse4
Muscrat6
Mudpuppy9
Mynah25
Norwegian Rat4
Nutria15
Opossum4
Ox20
Painted Turtle11
Pea Fowl23.2
Pheasant27
Pig -- wild25
Pionus Parrot40
Platypus10
Porcupine20
Prarie Dog10
Quail (California)6.9
Rabbit9
Rainbow Lorikeet15
Rat Snake23
Rattlesnake22
Red Eared Turtle30.5
Ring-necked Duck20.4
Rhinoceros40
Rosella15.4
Sheep15
Snapping Turtle57
South African Clawed Toad15
Sulphur Crested Cockatoo80
Superb Parrot36
Tapir30
Tasmanian Tiger7
Teal22.3
Tiger22
Tiger Salamander11
Toucan20
Tree Frog14
Trumpeter Swan33
Wood Duck22.5
Wombat15
Wolf18
Woodchuck15
Zebra Finch12

Environment, nutrition, preventive healthcare, infectious disease exposure, trauma risk, genetics, and husbandry can substantially shorten—or sometimes extend—an individual's lifespan relative to published averages or historical records.

References and Further Reading

  • Merck Veterinary Manual. Description and Physical Characteristics of Rabbits. Pet rabbits receiving good care and early spay/neuter: life expectancy 8–12 years.
  • Merck Veterinary Manual. Overview of Rodents and Biological Data of Pet Rodents. Typical pet-rodent lifespan ranges.
  • Merck Veterinary Manual. Description and Physical Characteristics of Ferrets. Typical life span 6–10 years.
  • Merck Veterinary Manual. Geriatric Diseases of Pet Birds. Potential pet-bird longevity varies widely with size, approximately 20–80 years.
  • UC Davis School of Veterinary Medicine. Desert Tortoise Care. Captive desert tortoises can live 60 years or more with appropriate care.
  • Texas A&M School of Veterinary Medicine & Biomedical Sciences. Dog Aging Project reporting notes an average canine lifespan of approximately 12–13 years, while emphasizing substantial individual variation.
  • Cornell Feline Health Center. Loving Care for Older Cats. Discusses increasing feline longevity and age-related care.