Deer ticks, also known as black-legged ticks, are small arachnids commonly found in wooded and grassy areas. They are most active in the spring and fall and are known for their role in transmitting diseases, particularly Lyme disease. Adult deer ticks are about the size of a sesame seed and can be difficult to spot. These ticks feed on the blood of mammals, including deer and humans. To reduce the risk of tick bites, it is advisable to wear protective clothing, use insect repellent, and check for ticks after spending time outdoors. Proper removal of ticks is essential to prevent disease transmission.