[txhurl]

What’s the difference between a crow, a grackle and a raven?
We have have hordes of grackles around here, a raven or grackle wouldn’t exactly stand out.

How do you tell?

[RushIsMyTeddyBear]

We have grackles here, too, that roost. Noisy as hell and love to get into the cat food. They have an irridescent sheen (green-blue) to their feathers and bright golden eyes. The call sounds like a squeaky screen door opening and closing.

[ClearCase_guy]

Grackle -- 11 inches or so. Slim and streamlined. Slim bill. Black will pronounced blue-ish sheen. They glisten.
Crow -- 16 inches or so. Fuller, heavier body. Black. Slim bill.
Raven -- 23 inches or so. Very full body -- a big bird. Black. Larger, substantial bill.

[HerrBlucher]

The Ravens say “nevermore?”

[RegulatorCountry]

Grackles aren’t particularly smart, move in huge flocks, foul everything wherever they are with copious splats of poop and have a very annoying call like a chorus of porch swings with rusty chains needing a good dose of WD-40.

Crows and ravens are more of the individualist though they will move in groups at times. They’re not such slobs. They’re not as easily startled by people either. If you shoot grackles they’ll go away but will be back. If you shoot crows or ravens, it will be a very long time before you ever see one again.