The CDC and its Advisory Committee on Immunization Practices (ACIP) now recommend that all adolescents aged 11-18 get vaccinated against meningococcal disease. That's not a radical change from the CDC's old meningitis vaccination schedule. In the past, vaccination of adolescents and young adults was recommended to coincide with specific ages or events, the CDC's Tom Clark, MD, said at a news conference today.
Cool Facts. 1  American Crows congregate in large numbers in winter to sleep in communal roosts. 2  Young American Crows do not breed until they are at least two years old, and most do not breed until they are four or more. 3  In some areas, the American Crow has a double life.
The nest can be found 5-25 feet above the ground, often in the crotch of a shrub or tree. Laying 2 white eggs that are incubated for 14-15 days. The young will leave the nest in 12-14 days. They have been known to reuse the same nest for five sets of eggs in a single season. Usually 2 - 3 broods raised each season.The peak of the breeding season is April-July although they may breed as late as October in some areas.ifespan. The average lifespan of first year birds is 1 - 1.5 years. First year birds have a mortality rate of 60 - 75 percent and adults have a mortality rate of 50 - 60 percent. For any songbird the first year of survival is the most difficult.