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.
They lay, on the average, three to eight eggs. One egg is laid every other day until the clutch is complete. The Pen does not begin incubating until her clutch is complete so that all cygnets will hatch within 24 hours of each other. Only one clutch of eggs is laid per year.The incubation period is approximately 34 days.The swans build their nests out of stems and leaves from plants such as cattails and sedges.Trumpeters often nest on top of muskrat houses or beaver lodges. male swan is called a Cob. The female is called a Pen and the young of the year are called cygnets. While male Trumpeters (21-38 pounds) are generally larger, weigh more than female Trumpeters (20-25 pounds), visually distinguishing the sexes is not possible without internal examination of the vent area.