Have you heard about coffee that's for the birds? There definitely is such a thing: shade-grown coffee. Until recently that's how all coffee grew: in the shade on small family farms. Canopy trees above provided shade along with a natural leaf mulch that kept soil moist, prevented soil erosion, and decomposed to provide nutrients. The canopy typically included fruit and nut trees that provided food for the farm family.
Here's a bird song we all recognize, the familiar crowing of, yes, crows, a species with many vocalizations. Crows are one of the most intelligent animals in the wild, and a lot of intelligent people have come up with theories to explain why.