Terrestrial mammals (mongooses and rats) in the food web are highly omnivorous, consuming prey form all but the quinary trophic level. Their large individual biomasses and high metabolic rates suggest that they may play important functional roles in the tabonuco forest. The recent introduction of terrestrial mammals to Puerto Rico may have had a disruptive effect on the structure of the food web at El Verde, in part by contributing to the extinction of previous links in the food web, and in part by assuming trophic positions not previously represented by any of the native animals. The long-term consequences of such disruptions on the dynamics of the food web at El Verde are unclear.

Bats are prominent nocturnal components of the food web at El Verde. They occupy three trophic groups: frugivores, and nectarivores and insectivores. The frungivores consume fruits of both early successional shrubs and late that occur in or above the forest canopy. Because of their role in recovery from disturbance during secondary succession, frungivorous and nectarivorous bats may be especially important in maintaining the spatial integrity of the food web.