| Food I | Food II | Food III | Food name | Country | Predator Stage |
|---|---|---|---|---|---|
| nekton | finfish | bony fish | Crayfish | (not available) | juv./adults |
| others | birds | n.a./other birds | unidentified birds | Canada | juv./adults |
| others | herps | toads/frogs | unidentified frogs | Canada | juv./adults |
| others | mammals | n.a./other mammals | small mammals | Canada | juv./adults |
| others | others | n.a./others | digested animal matters | USA | juv./adults |
| zoobenthos | benth. crust. | benth. copepods | unidentified copepods | USA | juv./adults |
| zoobenthos | benth. crust. | n.a./other benth. crustaceans | unidentified decapods | USA | juv./adults |
| zoobenthos | benth. crust. | n.a./other benth. crustaceans | unidentified | (not available) | juv./adults |
| zoobenthos | insects | insects | unidentified dipterans | USA | juv./adults |
| zoobenthos | insects | insects | unidentified mayflies | USA | juv./adults |
| zoobenthos | insects | insects | unidentified hemipterans | USA | juv./adults |
| zoobenthos | insects | insects | Odonata | USA | juv./adults |
| zoobenthos | insects | insects | unidentified stoneflies | USA | juv./adults |