Geoscience Reference
In-Depth Information
1.0
76-96
0.8
0.6
0.4
0.2
0.0
0
500
1000
1500
Distance (km)
2000
2500
FIGURE 9.3
Estimated probability of house finch becoming locally extinct at a Breeding Bird Survey route
between successive 5-year periods as a function of distance from Long Island.
1.0
76
81
86
91
96
01
0.8
0.6
0.4
0.2
0.0
0
500
1000
1500
Distance (km)
2000
2500
FIGURE 9.4
Estimated probability of house finch being present on a Breeding Bird Survey route in 1976-
2001 as a function of distance from Long Island. Estimates are derived from occupancy in 1976
and colonization and extinction probabilities.
