Haploperla brevis

Haploperla brevis (Banks, 1895) Notes Haploperla brevis is commonly known as the Least Sallfly (Stark et al. 2012). This widespread and common species is known from the Canada Atlantic Maritime Provinces west to British Columbia and Nunavut and in the USA from Maine west to Oklahoma and Arkansas, south to Florida, and southwest to Oklahoma (Surdick 2004, DeWalt et al. 2024, Hart et al. 2025). Previous studies on the biology and life history of this species have indicated a two-to-five-month egg diapause and a slow univoltine life cycle in Quebec and Oklahoma, respectively (Harper and Magnin 1969, Ernst and Stewart 1985). In contrast, Barton (1980) indicated a univoltine-slow life cycle for H. brevis in Alberta. Adults have been collected in New York from early May to mid-August (Fig. 26) from elevations ranging from 3-763 m asl (Fig. 27), and from a wide range of stream sizes across the state (Fig. 29 b).