The birds and the bees typically refers to when parents talk to their children about sex, but in the case of coffee, birds and bees bring in some great benefits to coffee. We already know that coffee farms can coexist with nature and that there tends to be some benefits, but this was never measured intensely. A series of studies involving 30 farms did the following: Coffee farms excluding bees and birds, excluding birds only, excluding bees only, and finally including both. The results? Without birds and bees, the average yield dropped by 25%,