The blacklegged tick is named for its dark legs, which are a contrast to its pale body. Blacklegged ticks are sometimes called deer ticks.

Habits
These ticks like to feed on the blood of white-tailed deer, which is why they are sometimes called deer ticks.

Habitat
Blacklegged ticks prefer to hide in grass and shrubs.

Threats
Blacklegged (deer) ticks can spread Lyme Disease.

Prevention
When in an area where ticks are common, wear long sleeved shirts and pants, preferably light colored so ticks will be easy to detect. Tuck pants into socks. Use a tick repellent. When you return indoors, inspect clothing and skin thoroughly for ticks, including head. Wash clothes immediately.

Information Courtesy of Wikipedia and the National Pest Management Assn.