- There are about 40 or so species in the Corvus genus.
- Crows are emotional animals, too. They react to hunger and invasion by vigorously vocalizing their feelings. They display happiness, anger and sadness.
- Nests are constructed from branches and twigs, and are lined with bark, plant fibers, mosses, hair, twine, cloth, and other soft material.
- Crows make a wide variety of calls or vocalizations. Crows have also been observed to respond to calls of other species; this behavior is, it is presumed, learned because it varies regionally.
- Crows are omnivorous, and their diet is very diverse. They will eat almost anything, including other birds, fruits, nuts, mollusks, earthworms, seeds, frogs, eggs, nestlings, mice and carrion.
- Crows found all over the world, except for Antarctica.
- The female incubates four to five eggs for 18 days, at times being fed by her mate or sometimes by offspring from the previous year.
- Mating crows will often remain together for years and some until parted by death. Most of the offspring will leave the nest after a couple months never to return.
- The common crow will usually live for about seven years, although some have lived as long as 14 years in the wild.
- Almost all corvids have been observed using tools, and the Raven can be taught to speak basic human language.
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