crow
- Feathers: less shiny may have lighter markings
- Bill: smaller and flat. Ther is no tuft of hair atop the bill.
- Size: smaller, size of a pigeon.
Raven
- Feathers: shiny and wet sheen
- Bill: bigger more powerful and curved. There is a tuft of hair atop the bill.
- Size: larger; almost size of Redtailed Hawks
For more info click the site I used to ask this answer 4. http://www.diffen.com/difference/Crow_vs_Raven