The ecological niche of a robin is they eat worms,and live in trees they love animals because they can't be eaten by any animal.
Where they live, usually
An ecological niche is an organism's mode of life; it is the sub of its adaptations. (You could think about it as the organism's "profession".)
The English term 'ecological niche' means (ecology) the status of an organism within its environment and community (affecting its survival as a species)
i don't know... mabye with it's mouth?