Farmers plant wheat. Crows eat wheat. (I mean, the farmer conveniently plants this all-you-can-eat buffet for them!) If the farmers and the crows could talk, surely they could come to an amicable arrangement... right?
Maybe, maybe not. Maybe, instead of talking like sensible creatures, the farmer will outdo himself making progressively scarier scarecrows, and the crows will outdo EVERYBODY making progressively scarier scarefarmers, and in the meantime the wheat will wither in the field and nobody will get to eat some. At least, not until they talk it over for a change.
Very good and clear moral message for kids, and it juuuuuust avoids being too "preachy" and annoying.