Different for different species of birds. Usually fairly short, a low number of weeks.
it takes about 1 week
3month
a long time
An average of 42 days is the time is takes for a ferret to give birth.
i think it will take about two weeks
53 seconds
100 Years
It takes 12 months for a dolphin to give birth to another dolphin (calf).
It takes about 60 to 63 days for a female coyote to give birth.
as long as it takes for yo mama to give birth
About 30 days
about 72 hours
like a year
it takes one hour