In this section
Other true flies
- Dance fly (Empididae)
- Horse flies (Tabanidae)
- House fly (Muscidae)
- Long legged flies (Dolichopodidae)
- Marsh flies (Sciomyzidae)
- Mosquito (Coquillettidia)
- Mosquito (Culicidae)
- Moth fly (Psychodidae)
- Pelecorhynchid flies (Pelecorhynchidae)
- Primitive cranefly (Mischoderus)
- Rat tail maggots (Syrphidae)
- Sandfly or black fly (Austrosimulium)
- Shore flies (Ephydridae)
- Soldier fly (Stratiomyidae)
- Wood gnat (Anisopodidae)
The ephydrids (“shore flies”) are among the less common true flies in our fresh waters. Their larvae have a maggot-like body with a velvety surface texture, and at the end of the abdomen there are two respiratory siphons or (rarely) two black hooks. There is no visible head. Some species have caterpillar-like pseudopods along the underside of the body.
Ephydrid larvae are found in many stream types including algae-covered streambeds, and some species are common in geothermally heated waters.
Ephydrid larvae are thought to graze on stream biofilms (algae and other microorganisms on submerged surfaces).
- Hard bottom: 4
- Soft bottom: 1.4
The tolerance values (ranging from 0 to 10) give an indication of which are the sensitive taxa (values of 8 or more) and which are the tolerant taxa (values of 3 or less). For more information see: Indicator species
Some ephydrids can be found in polluted or low oxygen waters and as a result they have relatively low tolerance values of 4 (hard bottom sites) and 1.4 (soft bottom sites).