Animal
|
Average Days
|
Bear (Black)
|
210
|
Bison
|
270
|
Budgerigar
|
18
|
Camel
|
410
|
Cat
|
65
|
Cattle
|
281
|
Chicken
|
21
|
Chimpanzee
|
236
|
Chinchilla
|
111
|
Coyote
|
63
|
Deer (Mule)
|
200
|
Dog
|
63
|
Donkey
|
365
|
Duck
|
28
|
Duck (Muscovy)
|
35
|
Elephant
|
660
|
Elk, Wapiti
|
255
|
Ferret
|
42
|
Finch
|
14
|
Fox
|
52
|
Giraffe
|
425
|
Goat
|
150
|
Goose
|
28
|
Gorilla
|
270
|
Guinea fowl
|
28
|
Guinea pig
|
68
|
Hare
|
36
|
Hippopotamus
|
240
|
Horse
|
338
|
Human
|
274
|
Leopard
|
95
|
Lion
|
108
|
Llama
|
350
|
Marmoset
|
150
|
Mink (European)
|
41
|
Monkey (Macaque)
|
180
|
Moose
|
240
|
Mouse
|
20
|
Muskox
|
255
|
Muskrat
|
29
|
Nutria, Coypu
|
130
|
Opossum
|
12
|
Otter
|
285
|
Panther
|
90
|
Parrot
|
26
|
Pheasant
|
24
|
Pig
|
114
|
Pigeon
|
18
|
Porcupine
|
210
|
Pronghorn
|
230
|
Quail
|
16
|
Rabbit
|
31
|
Raccoon
|
63
|
Rat
|
21
|
Reindeer
|
225
|
Rhinoceros (African)
|
480
|
Seal
|
330
|
Sheep
|
150
|
Shrew
|
20
|
Skunk
|
63
|
Squirrel (Gray)
|
40
|
Swan
|
35
|
Tapir
|
390
|
Tarsier
|
182
|
Tiger
|
103
|
Turkey
|
28
|
Walrus
|
450
|
Whale (Sperm)
|
450
|
Wolf
|
63
|
Woodchuck
|
31
|
|
Animal Notes and Table Data Sources
|
|
Notes
- Each animal species has different variations +/- the average values shown in the table.
- Gestation is the carrying of an animal embryo or fetus inside a female viviparous animal.
- Incubation is the laying of an egg (birds, reptiles, monotremes) with development occurring outside the female animal.
Data Sources
- The House Mouse: Atlas of Mouse Development by Theiler Springer-Verlag, NY (1972, 1989).
- The Genetics of the Dog. E Ostrander, E. and Ruvinsky, A. ISBN: 9781845939403 (2012)
- Merck Veterinary Manual. Aiello, S.E. and Moses, M.A. (ed) ISBN: 0911910506 (2013) Online
- Witschi, E. (1962) Development: Rat. In: Growth Including Reproduction and Morphological Development. Altman, P. L. , and D. S. Dittmer, ed. Fed. Am. Soc. Exp. Biol., Washington DC, pp. 304-314.
|