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Table

from

Encarta

Average Animal Gestation Periods and Incubation Times

Animal

Gestation¹/incubation² (days)

Mammals
ass	365
baboon	187
bear (black)	210
bear (grizzly)	225
bear (polar)	240
beaver	122
buffalo (American)	270
camel (Bactrian)	~410
cat (domestic)	58-65
chimpanzee	230-250
chinchilla	110-120
chipmunk	31
cow	279-292
deer (white-tailed)	201
dog (domestic)	58-70
elephant (Asian)	645
elk (Wapiti)	240-250
fox (red)	52
giraffe	420-450
goat (domestic)	145-155
gorilla	257
guinea pig	68
hippopotamus	225-250
horse	330-342
kangaroo	42
leopard	92-95
lion	108
llama	330
mink	40-75
monkey (rhesus)	164
moose	240-250
mouse (domestic white)	19
mouse (meadow)	21
muskrat	28-30
opossum (American)	12-13
otter	270-300
pig (domestic)	112-115
porcupine	112
puma	90
rabbit (domestic)	30-35
raccoon	63
rhinoceros (black)	450
seal	330
sea lion (California)	350
sheep (domestic)	144-151
squirrel (gray)	30-40
tiger	105-113
whale (sperm)	480-500
wolf	60-68
zebra (Grant's)	365
Birds
chicken	20-22
duck	26-28
finch	11-14
goose	25-28
parrot	17-31
pheasant	24
pigeon	10-18
quail	21-23
swan	33-36
turkey	28
1. Mammals. 2. Birds.

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