Table 1. Estimates used to parameterize optimization problem.
| Region | Bird density (km−2) | Habitat Cost ($US millions/km2) | Cost per bird ($US) | Annual Rate of habitat loss | Available habitat (km2) | Parcel size (km2) | Parcels per region |
| Western Greater Antilles | 360 (2) | 2.88 (4) | 8,012 | 2.5% (1) | 351 | 43 | 8 |
| Eastern Greater Antilles | 537 (1) | 3.88 (5) | 7,238 | 1.4% (3) | 3523 | 252 | 13 |
| Mexico | 215 (4) | 2.29 (3) | 10,645 | 2.1% (2) | 4400 | 462 | 9 |
| Lesser Antilles/South America | 320 (3) | 1.85 (2) | 5,768 | 0.7% (4) | 2366 | 76 | 30 |
| Central America | 90 (5) | 0.63 (1) | 7,055 | 0.7% (4) | 2207 | 77 | 28 |
Bird density, cost, threat, available habitat, parcel size and number of parcels available for acquisition for 5 regions in the wintering range of the American redstart. Numbers in brackets represent a rank of parameters based on their relative priority from 1 (high priority) to 5 (low priority). Based on these ranks it is impossible to design an optimal investment strategy.