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.
When will eggs hatch?Tree Swallow eggs need about 14 days of incubation for embryo growth and development to reach the hatching stage. Songbird eggs lose about 20% of their weight between laying and hatching. Why?Some weight is lost as fuel is burned during embryonic metabolic processes.