Table 1

Foraging item LS SE BCI SE Ants Emerging 64.1 7.37 75 16.5 Ants Returning 77.3 15.4 82.8 20.7 Nectar 0.50 0.52 0.46 0.55 Nothing 0.29 0.22 0.38 0.29 Nest materials 0.094 0.092 0.058 0.04 Total prey 0.093 0.069 0.036 0.04 Atta cephalotes 0.053 0.057 unknown   Lepidopteran larvae 0.028 0.02 0.005 0.009 Unsure 0.021 0.34 0.073 0.075

Mean ( 1 SE) number of Paraponera clavata emerging and returning per hour, and mean proportion of items returned (e.g., an average of 50% of ants at La Selva nests returned with nectar). Means are based on 13 colonies at La Selva Biological Station (LS) and 12 colonies at Barro Colorado Island (BCI). "Total prey" includes lepidopteran larvae and Atta.