As we kickoff the traditional start to the summer and head outdoors, remember to apply that sunscreen. Oh, and watch for ticks. According to Andrew Li, an Agricultural Research Service (ARS) entomologist who is leading a new deer tick control program, they’re out in force, too. Experts predict 2017 will see the highest number in years of these sesame-seed-size parasites—also known as “blacklegged ticks”—that spread the bacteria that cause Lyme disease.