Late needle fly

As late needle fly are not commonly trapped using bait, food-based traps are generally not applicable.

The eggs of late needle fly are typically laid in fresh, fast-flowing streams or rivers with a stone substrate where they hatch into nymphs. These nymphs are aquatic and can be found clinging to submerged rocks, vegetation, or detritus, often in cooler water regions. As they progress through instars, they remain within similar aquatic environments. When ready to pupate, late needle fly nymphs migrate to the edges of the water or to the under-surface of rocks or leaves near the water. After the final molt, the adult late needle fly emerges, and while they do not travel far from the aquatic habitats of their youth, adults are usually found on nearby vegetation or stones close to the stream or river where they developed.

The best time to locate late needle fly is usually during their active periods in daytime or near dusk, depending on the species and life stage.

Late needle fly are often easier to find during humid conditions when they are more active, especially after rain or near water sources.