Crane flies are vegetarian and harmless for animals. Robber flies are specialized predators of other flies, so: mosquito eaters. Different evolutionary lines.

Crane flies are vegetarian and harmless for animals. Robber flies are specialized predators of other flies, so: mosquito eaters. Different evolutionary lines. We could say that crane flies are like insect equivalent of cranes and robber flies are like hawks. In fact they are called hawk flies also.