There are no easy answers.

• Position: Mosquitoes

Mosquitoes are attracted to heat, light, and two chemicals humans produce--carbon dioxide and lactic acid. There are more than 1,700 species in North America. Only the female mosquito bites. Mosquitoes are born in standing water and rarely travel more than 300 feet from their place of birth. The male lives a week; females two. Mosquitoes carry malaria, yellow fever, dengue, and West Nile virus and cause more deaths than any other insect or animal.

Avoid the outdoors at dusk, in the early evening, or at dawn when mosquito infestation is heaviest. If you are outdoors during those times, wear long-sleeved shirts and long pants. Bear in mind that mosquitoes can bite through thin cloth. Turn over plastic pools or other water containers when not in use. Clean out birdbaths and clogged roof gutters. Ventilate ornamental pools or stock them with fish.

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