Northern Prairie Wildlife Research Center
| Reference | Waterfowl (general) | Dabbling ducks | Diving, sea, and stiff-tailed ducks | Geese and brant | Swans |
| Scirpus maritimus | |||||
| McAtee 1918 |   | 1 |   |   |   |
| Wetmore 1918 |   | 2 |   |   |   |
| Mabbott 1920 |   | 2 |   |   |   |
| Wetmore 1921 |   |   |   | 2 |   |
| Steenis 1939 | 1 |   |   |   |   |
| Addy 1946 |   | 2 |   |   |   |
| Mendall 1949 |   | 1 |   |   |   |
| Yocom 1951 |   | 2 |   |   |   |
| Harris 1952 |   | 2 |   |   |   |
| Spencer 1953 |   | 2 |   |   |   |
| Stirrett 1954 |   |   |   | 1 |   |
| Gillham 1956 |   |   |   |   | 1 |
| Keith and Stanislawski 1960 |   | 2 |   |   |   |
| Keith 1961 |   | 2 | 2 |   |   |
| Yocom and Keller 1961 |   | 2 | 2 |   |   |
| Hartman 1963 |   | 1 |   |   |   |
| Gore 1965 | 2 |   |   |   |   |
| Lebret 1965 |   |   |   | 4 |   |
| Gaevskaya 1966 |   |   |   | 1 |   |
| Cronan and Halla 1968 |   | 1 | 1 |   |   |
| Nagel 1969 |   |   |   | 3,4 |   |
| Burgess 1970 |   | 2 |   |   |   |
| Swanson and Bartonek 1970 |   | 2 |   |   |   |
| Fiala and Kvet 1971 | 3,4 |   |   |   |   |
| Kvet and Hudec 1971 |   |   |   | 3 |   |
| Tamisier 1971, cited in Podlejski 1981 |   | 2 |   |   |   |
| Kerwin and Webb 1972 |   | 1 | 1 |   |   |
| Zwarts 1972, cited in Reed 1989 |   |   |   | 3,4 |   |
| Kadlec and Wentz 1974 | 2 |   |   |   |   |
| Loosjes 1974, cited in Reed 1989 |   |   |   | 3,4 |   |
| Ondok and Kvet 1978 |   |   |   | 1 |   |
| Pehrsson 1980 |   | 2 |   |   |   |
| Podlejski 1981, 1982 | 2 |   |   |   |   |
| Duncan and D'Herbes 1982 |   | 2 |   |   |   |
| Pederson and Pederson 1983 |   | 2 |   |   |   |
| Euliss 1984 |   | 2 |   |   |   |
| Smith and Kadlec 1985c |   |   | 3 |   |   |
| Miller 1987 |   | 2 |   |   |   |
| Euliss and Harris 1987 |   | 2 |   |   |   |
| Pehrsson 1988 |   | 2 |   | 4 |   |
| Hothem and Ohlendorf 1989 |   | 2 |   |   |   |
| Thorn and Zwank 1993 |   | 2 |   |   |   |
| Scirpus robustus | |||||
| McAtee 1910 |   |   |   | 3,4 |   |
| Mabbott 1920 |   | 2 |   |   |   |
| McIlhenny 1932 |   |   |   | 4 |   |
| Cottam 1935 |   |   |   | 3,4 |   |
| Addy 1946 |   | 2 |   |   |   |
| Glazener 1946 |   |   |   | 4 |   |
| Lynch et al. 1947 |   |   |   | 4 |   |
| Beckwith and Hosford 1956 |   | 1 |   |   |   |
| Beter 1957 |   | 2 |   |   |   |
| Stewart and Manning 1958 |   |   |   |   | 2 |
| Kimble 1958 |   | 2 | 2 |   |   |
| Chamberlain 1959 | 2 |   |   | 2 |   |
| Davison and Neely 1959 | 1 |   |   |   |   |
| Yelverton and Quay 1959 |   |   |   | 2,4 |   |
| Neely 1960 | 2 |   |   |   |   |
| Glasgow and Bardwell 1962 |   | 2 |   |   |   |
| Stewart 1962 |   | 2 |   |   |   |
| George 1963 |   | 2 |   | 3,4 |   |
| Bardwell et al. 1965. |   | 2 |   |   |   |
| George et al. 1965, cited in Mall 1969 |   | 2 |   |   |   |
| Stieglitz 1972 |   | 1 |   |   |   |
| Kadlec and Wentz 1974 | 2 |   |   |   |   |
| Landers et al. 1976 |   | 2 | 2 |   |   |
| Prevost et al. 1978 |   | 2 |   |   |   |
| Beam and Gruenhagen 1980 |   | 2 |   |   |   |
| Connelly and Chesemore 1980 |   | 2 |   |   |   |
| Sandifer et al. 1980 | 1 |   |   |   |   |
| Smith and Odum 1981 |   |   |   | 1 |   |
| Smith, T. 1983 |   |   |   | 4 |   |
| Strange 1987 |   |   |   | 4 |   |
| Stutzenbaker and Weller 1989 |   |   |   | 3,4 |   |
aAchenes may also serve as grit.