Copied from lady-bugs.org
The Ladybug: Friend or Foe?
The ladybug, or Coccinellidae, has six jointed legs, a pair of antennae, and the three-part body, all consistent with the insect species. However, the ladybug happens to be one of the best loved insects in the world. Children love ladybugs as they are easy to catch and are brightly colored and most gardeners enjoy them as they eat aphids.
While the correct name for this insect is lady beetle, ladybug is the name that is most commonly used. There are over 450 species of ladybugs in North America alone. While many of these are native, some were brought into the area from other countries. There are more than 5,000 different ladybug species in the world. While they are usually of a red or orange coloring with black markings, there are some that are black with reddish colored markings and some may have yellow coloring, as well.