Quality living means having a high standard way of life manifested both in your property and lifestyle. For instance, if you are living in a house that is totally healthy and clean, you can expect that residents are equally healthy and in total upkeep. However, if you go inside the house and find crawling creatures and all sorts of pests reveling around, expect that the people who live there have sub-standard way of life. Pests are destructions and deteriorate your quality of life.
The main problems with wildlife in your yard will likely be the destruction that animals can cause while they try to eat everything edible they can find in your yard and the damage they cause while they try to nest in your house and yard.