Pitcher plant (Nepenthes hemsleyana) with woolly bat (Kerivoula hardwickii) |
Mutualism as a result of evolution is a well-known phenomenon to biologists but this example is, by any stretch of the imagination, unusual and even a little counter-intuitive. It has ended up with a carnivorous pitcher plant switching from a diet of captured insects to one consisting of bat faeces.
Examples of mutualism can be found in for example, the production of nectar by flowers which supplies insects with food in return for targeted dispersal of pollen. The insects gets fed and the plant gets its pollen delivered to another flower of the same species without the wastefulness and hit and (mostly) miss nature of wind dispersal. Another example would be the gut microbes in ruminants and termites which digest plant cellulose providing nutrients from an otherwise indigestible resource in return for shelter, warmth and a ready supply of raw materials.