Table 3. Probability of spatial co-occurrence for two at risk species and fire ants in South Carolina as quantified by using a logistic regression derived fire ant distribution model and a probability of encounter fire ant distribution model. Overall risk index, shown in parentheses, is calculated as the product of the probability of co-occurrence and the hazard index. Species Probability of co-occurrence with fire ants based on logistic fire ant model Probability of co-occurrence with fire ants based on probability-of-encounter fire ant model Common ground-dove .8329 (risk index = 0.69) .6354 (risk index = 0.53) Swallow-tailed kite .7210 (risk index = 0.48) .4025 (risk index = 0.27)