Yes, the Magpie and the Raven are both Corvids.
Like all corvids, ravens will eat most anything organic.
Yes. All corvids cache food.
Owls are supposed to be wise, but corvids like crows are the smartest birds.
Corvids, like magpies, crows and ravens and jays, are long lived birds, some to twenty years. For the magpies, we will guess around a ten year maximum, so roughly eight to one.
Arctic foxes and wolves may prey on adults, while skuas, corvids, and foxes may be a threat to eggs and chicks.
Like all members of the family Corvidae, ravens are omnivores. Corvids include besides ravens, crows and jays.
The eggs are sometimes eaten by opossums, corvids and coatis. The adults have no predators. However the birds are endangered due to people poaching them for pets.
Birds of prey eat other birds, as do some corvids (crows), for instance Eurasian Magpies eat the eggs and chicks of small songbirds.
Ravens don't sing, so much as they have a grating "g-r-a-a-a-a-c-k" kind of sound, as well as the typical "caw" associated with most corvids.
No, it is not possible because a robin can only pass robin genes on to its offspring
Kingdom Animalia Phylum Chordata Class Aves Order Passeriformes Family Corvidae Genus Cyanocitta Species cristata