Corvidae is a cosmopolitan family of oscine passerine birds that contains the crows, ravens, rooks, jackdaws, jays, magpies, treepies, choughs, and nutcrackers. In colloquial English, they are known as the crow family or corvids. Currently, 133 species are included in this family. The genus Corvus, including the jackdaws, crows, rooks, and ravens, makes up over a third of the entire family. Corvids are the largest passerines.
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- a person or thing that develops or innovates.
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- a person who invests in and develops the urban or suburban potentialities of real estate, especially by subdividing the land into home sites and then building houses and selling them.
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