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.
Does not build its own nest. Adult females lay an average of 2 eggs per clutch with a range of 1 to 4 eggs. The eggs are incubated for 30 days. The chicks start moving out of the nest at 5 weeks and learn to fly at 6 weeks of age. Spotted owl pairs do not typically nest every year, nor are nesting pairs successful every year.