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Grackle

If I See a Black Bird in My Backyard, How Do I Tell if It's a Crow, Blackbird, Grackle, or Raven?

Quora | Posted 09.14.2013 | Science
Quora

Crows and ravens are notably large for songbirds, larger than pigeons. Blackbirds and grackles are smaller than pigeons, as are starlings and cowbirds.