Table 5-1. MEAN GESTATIONS OF SOME MAMMALS

Species				Days

Bandicoot				12
Opossum				14
Hamster				18
Mouse, shrew			20
Rat				22
Rabbit				30
Red kangaroo			35
Ferret				40
Squirrel				45
Fox				50
Coyote, dog, wolf			60
Cat, mink, raccoon			65
Guinea pig			68
Chinchilla, lion, pig, porcupine, tiger	115
Bat				120
Ring-tailed lemur			135
Goat, marmoset monkey, sheep	150
Rhesus monkey			170
Western-spotted skunk		220
Chimpanzee, red deer		230
Pronghorn				235
Bear, hippopotamus, moose		240
Armadillo				255
Gorilla				265
Human				270
American bison, cattle, otter		280
Walrus				330
Horse				335
Seal				350
Whale				360
Donkey				365
Camel				400
Giraffe				430
Rhinoceros			500
Elephant				660