They utter a distinctive call when conditions are right. It may be just a sprinkle, or it can be a downpour. It is difficult to describe the Rain Crows' rattling calls, usually uttered in series of twos, such as coo coo quickly followed by coo coo. It is difficult to slip up on them since they are adept at hiding and skulking in dense vegetation, any slight movement and they move to another tree. They have a way of keeping the heavy foliage between them and any stalker.
Cuckoos are extremely valuable to farmers and horticulturist, they consume many insects.
They apparently can't bring a rain, but they can sure predict when conditions are right for a rain. The Weather Bureau would do well to keep one of the bird nearby to supplement their sophisticated weather instruments.