Are Mallards Declining in North America?
Tables
| Year | % Change | |
|---|---|---|
| Predicted | Actual | |
| 1971 | 15.8 | -5.2 |
| 1972 | 3.6 | 0.2 |
| 1973 | 7.7 | -11.0 |
| 1974 | -10.6 | -15.8 |
| 1975 | 33.1 | 9.7 |
| 1976 | 4.2 | 6.5 |
| 1977 | 1.1 | -4.8 |
| 1978 | -9.7 | -6.5 |
| 1979 | 11.2 | 9.7 |
| 1980 | 15.6 | -5.2 |
| 1981 | -16.5 | -15.6 |
| 1982 | -6.7 | -1.1 |
| 1983 | 9.8 | 6.3 |
| 1984 | 6.2 | -15.9 |
| 1985 | -0.3 | -8.4 |
