What did your Hansdotter ancestors do for a living? Share Census records can tell you a lot of little known facts about your Hansdotter ancestors, such as occupation.
Best Answer: It varies by species..but most passerines (perching birds) take approximately 2 weeks to hatch their eggs, and usually another 2 weeks before the young leave the nest.
The amount of time it takes for incubation to begin depends on how many eggs are laid, whether there are delays inbetween eggs (e.g., due to weather), and whether the bird begins incubation the day before the last (penultimate) egg is laid, or on the day the very last egg is laid. Egg laying can be delayed (sometimes for a week or two - 3 weeks is not unheard of) in cold weather, for young parents, or in cases where food is scarce. 2  Tree Swallow: Nest building can take 2-4 weeks, and is done only by the female, and usually only during the morning.