who are its predators?
Owls, martens, and sometimes eagles
Common raven
 owls, martens, and sometimes eagles. 
how to tell the gender of a raven Females lay between three and seven pale bluish-green, brown-blotched eggs. Incubation is about 18 to 21 days, by the female only. The male may stand or crouch over the young is the common raven a bird? Yes, it is a large all-black passerine bird what colour is its feathers? Pale brownish-grey. how is it classified? The closest relatives of the common raven are the brown-necked raven, the pied crow of Africa, and the Chihuahuan raven of the North American Southwest. where can it be found? Across the Northern Hemisphere what are its typical habitats? Most common ravens prefer wooded areas with large expanses of open land nearby, or coastal regions for their nesting sites and feeding grounds. how does it behave? Common ravens usually travel in mated pairs, although young birds may form flocks. Relationships between common ravens are often quarrelsome, yet they demonstrate considerable devotion to their families.
wiki:13359907
Common raven [SEP] Predation
Owing to its size, gregariousness and its defensive abilities, the common raven has few natural predators. Predators of its eggs include owls, martens, and sometimes eagles. Ravens are quite vigorous at defending their young and are usually successful at driving off perceived threats. They attack potential predators by flying at them and lunging with their large bills. Humans are occasionally attacked if they get close to a raven nest, though serious injuries are unlikely. There are a few records of predation by large birds of prey. Their attackers in America have reportedly included great horned owls, northern goshawks, bald eagles, golden eagles and red-tailed hawks.