Insecticide to blame for hundreds of dead crayfish in Blue Mountains creek last month, EPA says

Some of the hundreds of crayfish found dead in a Blue Mountains creek last month. The NSW EPA says the insecticide bifenthrin was the cause of the deaths. Photograph: BMCC

An insecticide was the cause of a major crayfish kill in the Blue Mountains last month, the New South Wales environmental regulator has confirmed.

About 1,000 dead and dying giant spiny crayfish were found in a tributary of Hazelbrook Creek, near Horseshoe Falls, by a tour guide.