Table 2. Calculation of hazard indices based on six life-history traits that potentially increase species' vulnerability to fire ant impacts. A “+” indicates vulnerability. Hazard indices are produced by dividing the number of hazards to which targets are vulnerable by the total number of potential hazards. soft ground ground altricial spring/summer hazard Species ovipary shelled nesting foraging young young index Common ground-dove + - + + + + 0.83 Swallow-tailed kite + - + - + + 0.67