Table 1. Elements of the ecologically-based hazard index for assessing the relative risk of different life-history characteristics to fire ant impacts. Fire ant impacts on wildlife, and characteristics that lead to vulnerability to fire ant impacts, are reviewed in Allen et al. (2004).

Life-history characteristic
Safe
Vulnerable
Reproduction
live-bearing
egg-bearing
Eggs
hard-shelled
soft-shelled
Nests
in trees
on ground
Foraging
aerial/arboreal
on ground
Young
precocious
altricial
Reproductive timing
fall and winter
spring and summer