A bird nesting in a tree is an example of commensalism.
An example of commensalism is when a bird lives in a tree; the bird is helped by living in the tree because it has a place to build its nest and it is high up so protected from predators, but the tree is not affected.
- (biology) A sharing of the same environment by two organisms where one species benefits and the other is unaffected. An example is barnacles on whales.
- The act of eating together; table fellowship.
commensal + -ism
- Among many remarkable qualities they have been distinguished from the earliest times by a species of commensalism, or power of living among other nations without becoming either socially merged or politically distinct.
- Commensalism occurs in a few instances, but parasitism either external or internal is rare.
- From this we may pass through various grades of " commensalism," like that of the hermit-crab with its protective anemones, to the cases of actual parasitism.