Shredders - feed on organic matter by shredding, chewing then digesting.
Examples: stonefly, crane fly, caddisfly


Grazers - (scraper)
- feed on algae on rocks/hug the bottom
Examples: caddisfly, mayflies


Gatherers - roam the stream collecting deposits from rocks
Example: Mayflies

Filter collectors - use a "net" to catch small animals/invertebrates coming downstream
Example: caddisfly