Runner: If you want to see the Quail and rabbit populations return you need to plant fir trees and other shrubs and trees that give birds and rabbits protection from aerial attacks. Quail need to be able to get up off the ground far enough to avoid being killed by coyote, fox, raccoon, and possum, as well as feral cats and dogs. But they also need branches over their heads so that they can't be grabbed by hawks. The primary diet of hawks is meadow voles( field mice), but they do kill and eat rabbit babies, kittens, and the young of everything else, including game and song birds. The quail and pheasant populations deminish only because the cover is not extensive enough to protect the chicks. A really mature hawk can and will take a mature pheasant, and take it out of the air! But if there is enough cover, the pheasant populations will withstand this occasional loss. To grow lots of mice, you need grassy fields that are uncut, an dotted with bramble bushes, and scrub oaks, or other young trees. You want dead falls on the edges of the fields, where termites will eat the dead wood, worms will be active, and the shade will cause tall grass to die, but new grass shoots to grow. The shoots, the termites, the worms, and bugs, that eat the wood are all food for the mice. They also eat tons of grass and weed seeds. One acre of grass can support as many as 2500 mice! And Mice are the bottom of the food chain for most all predators. Grow mice, and you will have food for the hawks, so they don't have to chase your quail and pheasants. Plant cover and food plots for the birds, and you will see their numbers spring back. Asparagus seeded wild, provided both cover during the winter for quail, but also food for them, and the tangles of wild asparagus keep most predators out. In the Spring, you can cut the new shoots that come up every few days and eat fresh asparagus for a couple of month, more than paying you back for the effort made in planting the seeds. Once planted, they come back year after year, and the cover is just excellent for both quail and rabbits. Pheasants will also use it for cover. Fir trees that are about 20 feet tall are idea habitat for nesting birds, as they can get high enough up in the branches to avoid ground predators, but still have long bows and branches above them to protect them from hawks, and owls. If the branches of these firs drop all the way to the ground, rabbits and even deer will hide under them during bad weather. Nature's umbrella.