Animal Facts
LENGTH OF LIFE OF ANIMALS
Figures in this list are average life spans in years or gestation in days for animals in the wild, unless otherwise noted.
| Mammals | |
| Buffalo, American | 20 |
| Cat | 14 |
| Chimpanzee | 30-40 |
| Deer (fallow) | 20 |
| Dog | 12-20 |
| Elephant | 50-70 |
| Goat, Mountain | 14-18 |
| Grizzly bear | 25 |
| Hippopotamus | 41 |
| Horse | 20-30 |
| Lion | 13 |
| Monkey (rhesus) | 27-28 |
| Mouse (field) | 1 |
| Sheep | 10-20 |
| Squirrel | 7 |
| Tiger | 20 |
| Wolf (gray) | 12-16 |
| Zebra | 22 |
| Fish | |
| Dogfish (lesser spotted) | 8 |
| Goldfish | 10 |
| Halibut | 25 |
| Lamprey | 7 |
| Lungfish (African) | 18 |
| Perch | 3-10 |
| Pike | 60-70 |
| Salmon (Pacific) | 4-5 |
| Seahorse | 4 1/2 |
| Sturgeon | 50 |
| Trout (rainbow) | 11 |
| Birds | |
| Blue jay | 6-9 |
| Canada goose | 12-23 |
| Canary | 6-8 |
| Cardinal | 13 |
| Chickadee | 6-8 |
| Condor | 35-40 |
| Heron | 10-20 |
| Macaw | 64 |
| Ostrich (African) | 40 |
| Owl (snowy) | 10 |
| Penguin (emperor) | 20 |
| Pigeon | 6 |
| Raven | 5 |
| Robin, American | 17 |
| Skylark | 9 |
| Sparrow | 2 1/2-7 |
| Starling | 9-16 |
| Reptiles and Amphibians | |
| Bullfrog | 5 |
| Chameleon | 4-5 |
| Cottonmouth | 18-20 |
| Crocodile (Nile) | 25-50 |
| Garter snake | 3-4 |
| King snake | 3 |
| Puff adder | 14 |
| Rattlesnake (diamondback) | 14-15 |
| Salamander (spotted) | 20 |
| Turtle (box) | 80 |
| Water snake | 11 |
ANIMAL REPRODUCTION
| Animal | Approx gestation/hatch | Typical No. of newborn |
| Alligator (American) | 9 weeks | 50-60 |
| Ass | 340-385 days | |
| Bats (various) | 35-50 days | 1 |
| Bear | 208 days | |
| Camel | 406 days | |
| Cat | 63 days | 4 |
| Cinchilla | 110 days | |
| Cow | 281 days | |
| Dog | 63 days | 1-10 |
| Duck | 27 days | |
| Elephant | 624 days | 1 |
| Frog (bullfrog) | 5-20 days | 20,000 |
| Gerbil | 19-21 days | 4-7 |
| Goat | 148 days | |
| Guinea pig | 68 days | 1-5 |
| Hamster (golden) | 16 days | 6-9 |
| Horse | 336 days | 1 |
| Human | 267-280 days | |
| Kangaroo | 38-40 days | |
| Lion | 108 days | 3-4 |
| Monkey (spider) | 226-232 days | 1 |
| Mouse (field) | 19 days | 5-6 |
| Opossum | 12.5 days | |
| Rabbit | 31 days | 3-6 |
| Rat | 21 days | |
| Robin, American | 12-14 days | 4 |
| Sheep | 151 days | 1-2 |
| Swine | 114 days | |
| Squirrel (red) | 33-35 days | 4-6 |
| Tiger | 105-112 days | 2-3 |
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