Teens and young adults are at increased risk for meningococcal meningitis. What is meningococcal meningitis? The Centers for Disease Control and Prevention (CDC) recommends 2 doses of quadrivalent meningococcal conjugate vaccine for adolescents 11 through 18 years of age.
Physical Differences. Crows and ravens differ physically from one another, their size being the most noticeable. Ravens are larger than crows, making them the largest perching birds. Crows have a smooth texture whereas the raven has a dense and shaggy plumage particularly around the throat. The bill of the raven is also heavier than the crow's bill. During flight, the spreading of the tail can distinguish the crow and raven apart. The tail of the crow spreads into a fan-like structure while the tail of the raven spreads into a wedge shape.
Some blackbirds even have orange beaks! Telling a crow and a raven apart may be a bit trickier, but there ARE differences! For example, crows are smaller than ravens. A raven weighs twice as much as a crow! The beak of a crow is smaller and straighter than the beak of a raven, which is rounded at the bottom.In addition, the tail feathers of a crow are shaped like a fan, while the tail feathers of a raven come together in a central point.1  Share.ome blackbirds even have orange beaks! Telling a crow and a raven apart may be a bit trickier, but there ARE differences! For example, crows are smaller than ravens. A raven weighs twice as much as a crow! The beak of a crow is smaller and straighter than the beak of a raven, which is rounded at the bottom.