Hydropsyche bulgaromanorum is spread over whole Europe,
except for the southern regions; its eastern distribution extends
to N-, NW- and E-Russia.
Hydropsyche bulgaromanorum is a characteristic species
of the Potamal (Waringer & Graf 1997). Larvae inhabit large
rivers and streams (Botosaneanu & Malicky 1978, Pitsch 1993,
Robert & Wichard 1994, Edington & Hildrew 1995, Waringer
& Graf 1997) and may become the dominant species in reaches
immediately upstream of the estuary (Bournaud et al. 1982, Pitsch
1993, Edington & Hildrew 1995). The species tolerates moderate
organic pollutions (Graf et al. 2002).
Larvae are scrapers and filter feeders, feeding on aufwuchs, detritus
and small invertebrates (Waringer & Graf 1997, Graf et al. 2002).
Adults are on the wing from March to October (Waringer & Graf