Rumor has it that if you hear the call of a cuckoo today, that bird is predicting a wet summer. Don't ask us how he knows the future, he just does. The best way to avoid hearing the call of the cuckoo is to avoid areas with a dense population of cuckoo birds. Likewise, if you hear the call of a person yelling, 'Cuckoo! Cuckoo!' it might be advisable to avoid them too.