First it was black flies, and now it’s caddisflies plaguing the Colorado River in Laughlin.
The problem is so bad, Bullhead City plans to hire a full-time entomologist to deal with the pests.
What’s the deal with these silk-spinning, moth-like insects?
Chris Bramley is the supervisor for Clark County Vector Control. He told KNPR's State of Nevada that the caddisfly problem has been about six years in the making.
"The explosion is a multi-problem issue from we lost some of our game fish in the river to the black fly problem doing so well," he said. "So they just made this five, six year trip to the explosion extent that they're in now."
The insects swarm in the morning and again in the early evening. They don't bite or sting like black flies and mosquitos.
"They're a nuisance," Bramley said.
The entomologist hired by Bullhead City will focus on day-to-day efforts to control the population.
Bramley said there are several control methods the entomologist could use, including decoy lighting or pheromones control where the pheromones from female flies are placed away from populated areas to attract male caddisflies.
Chris Bramley, supervisor, Clark County Vector Control