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Semi-variogram estimates of the sill and range for the bird and human data from 2002 to 2005 as well as the average of the four years.
| Sill | Range | |
| Bird 2002 | 82.29 | 81368.91 |
| Bird 2003 | 82.34 | 132874.38 |
| Bird 2004 | 56.34 | 245213.13 |
| Bird 2005 | 355.07 | 335208.03 |
| Bird Total | 71.60 | 180000.00 |
| Human 2002 | 3.03 | 184517.40 |
| Human 2003 | 0.11 | 158159.40 |
| Human 2004 | 0.001 | 101754.00 |
| Human 2005 | 3.41 | 1270482.00 |
| Human Total | 1.04 | 112422.00 |
