Science Daily on animal pharmacology as part of the ecosystem:
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It’s been known for decades that animals such as chimpanzees seek out medicinal herbs to treat their diseases. But it now appears that the practice of animal self-medication is a lot more widespread than previously thought, according to University of Michigan ecologist Mark Hunter and his colleagues.
Animals use medications to treat various ailments through both learned and innate behaviors. The fact that moths, ants and fruit flies are now known to self-medicate has profound implications for ecology and evolution.
Wood ants incorporate an antimicrobial resin from conifer trees into their nests, preventing microbial growth in the colony. Parasite-infected monarch butterflies protect their offspring against high levels of parasite growth by laying their eggs on anti-parasitic milkweed. Lacking many of the immune-system genes of other insects, honeybees incorporate antimicrobial resins into their nests.
“Perhaps the biggest surprise for us was that animals like fruit flies and butterflies can choose food for their offspring that minimizes the impacts of disease in the next generation,” Hunter said.