what do the original birds eat?
microtine rodents, caribou and ptarmigan carcasses, maggots and carrion beetles.
Common raven
microtine rodents, and half by scavenging, mainly of caribou and ptarmigan carcasses.

In some places they are mainly scavengers, feeding on carrion as well as the associated maggots and carrion beetles.
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. who are its predators? Owls, martens, and sometimes eagles
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Common raven [SEP] Feeding
A more mundane explanation is that individuals co-operate in sharing information about carcasses of large mammals because they are too big for just a few birds to exploit. Experiments with baits however show that such recruitment behaviour is independent of the size of the bait.