Have you ever wondered how to tell a crow and a raven apart? Here is an excellent, short video produced by The Cornell Lab of Ornithology explaining the differences between the two:
https://www.youtube.com/watch?v=eZ5iippq3rA&list=UU5Lz88Rt3GT75YT2ORAmaMQ&index=3
American crow — Corvus brachyrhynchos 30157 CC BY 2.5
Raven — Corvus corax ad berlin 090516 CC BY-SA 3.0