Basking sites do not need to be elaborate. In the garden, the basking site can be a few rocks that warm quickly in the morning sun. In addition to providing a spot for animals to warm their bodies, a small pile of rocks also can provide shelter from predators. In a garden pond, a rock or a log can provide a basking site for frogs and turtles. Butterflies, as well as insects, are cold blooded and move very slowly when the temperatures are low.
Butterflies tend to be active on sunny days and inactive when it is cloudy.
In the early morning and on cool days, butterflies often can be seen with their wings open soaking up the heat. They must increase their body temperature before they are capable of strong flight. A light-colored rock or garden ornament placed to catch the early morning sun, can be used as a site for butterflies to perch on while waiting for their body temperatures to rise. In addition to serving as basking sites, rocks, old logs, and small brush piles can benefit other wildlife. Rocks and logs placed in shade can provide relief and shelter from the mid-day heat of summer.