Coccinellidae is a widespread family of small beetles ranging from 0.8 to 18 mm (0.0315 to 0.708 inches). They are commonly yellow, orange, or red with small black spots on their wing covers, with black legs, heads and antennae. However such colour patterns vary greatly. For example, a minority of species, such as Vibidia duodecimguttata, a twelve-spotted species, have whitish spots on a brown background. Coccinellids are found worldwide, with over 6,000 species described. Coccinellids are known as ladybugs in North America, and ladybirds in other areas. Entomologists in the United States widely prefer the names ladybird beetles or lady beetles as these insects are not true bugs.