Incubation period of pigeon is 14 days, hen 21 days duck 28 days
peacock 63 days.
2007-02-23 01:05:03 · 6 answers · asked by ramesh m 1 in Science & Mathematics ➔ Zoology
only 25%(approx.) bird's have such incubation period ; not most or all.
the reason attributed to even these 25% is :
--theory of evolution
--similar reproductive systems
--survival of the fittest
--nature , and
--God.
2007-02-23 23:41:06 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Other birds have other incubation periods, not multiple of 7.
And real incubation period in particular bird can be 1 day shorter or longer than textbook number. One of the reasons for your notion can be that multiple of 7 is easy to remember.
2007-02-23 09:17:17 · answer #2 · answered by zuska m 2 · 0⤊ 0⤋
different birds have different incubation rates...they range greatly and most are NOT multiples of 7. Most passerines are typically 12 days...some go up to 14-18 days. Hummingbirds are around 28-30 days, and different species of duck can range as well.
2007-02-23 22:48:08 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Emperor penguin - 60 days
King penguin - 54 days
Adelie penguin - 36 days
Gentoo pengion - 33 days
Yellow eyed penguin - 45 days
Little penguin - 39 days
Jackass penguin 28 days
I don't have precise dates on the others but most penguin incubation periods are not multiples of 7.
2007-02-23 21:14:19 · answer #4 · answered by tentofield 7 · 0⤊ 0⤋
They have a weekly schedule to follow
2007-02-23 09:55:53 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Hmmm i think since a week contains 7 day, God created them in that way....... :-)
2007-02-25 07:29:08 · answer #6 · answered by jes 2 · 0⤊ 0⤋