Originally Posted By: venaticThere are 4 different species of crows in North America and they all sound different. The American crow is the most common but there is also a Fish Crow,Northwestern Crow and the Tamaulipas(Mexican) crow.
Except for having a southern accent, this may be the most plausible reason for the differences in crow talk. They looked the same, flew the same, and answered to the same hand call.