Aedes aegypti are aggressive daytime biters. Culex quinquefasciatus, the most-trapped mosquito species in the area and the variety that spreads West Nile, feed on birds and humans usually at twilight.

Utah isn't among the worst U.S. states for mosquitoes, yet varied species make themselves at home in the Beehive state. Among these pesky fliers is the Northern House Mosquito, Culex pipiens ...