Consider leaving that dead branch or tree where it is if it doesn't pose a hazard. Skunks, raccoons, and squirrels are opportunists, and can become pests and cause property damage. Cover window wells. Patch holes around and under the foundation. Keep all garbage and pet food where wildlife cannot smell it or get to it.
Caterpillars eat lots of foliage, butterflies sip nectar from flowers.
These usually occur on different plants. Consider planting foliage for caterpillars near flowers for butterflies. Bird feeders and baths close to sheltering vegetation are desirable, unless there are cats loose in the neighborhood. Vegetation that provides shelter to birds also gives cats an ideal hiding place. Safety Around Wildlife Human injury or illness from wildlife is rare.