Guineas are remarkable in many ways. They not only keep down the bugs in your garden but also the mice and other rodents. A flock will take these on easily. I don't know about them predicting weather - in fact, auntie used to put on a light in their house if it was too cold - but they are excellent watch dogs! They will raise a ruckus if anything seems out of order. When we would pull into auntie's farm, the guineas would be hollering before we were halfway down the drive! (Which was a ways, I'll say...)