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this parrticular behavior of warblers displays which ecological characteristic?
A. They cannot share the same niche in the same habitat.
B. They can have more than one niche in an environment.
C. Their niche is to help control the tree growth.

or the past two years I’ve had a robin’s nest in a small Colorado Spruce in my front yard. This winter I noticed that there had been two nests all along, one around two feet above the other. I have always seen the Robins guarding the tree from march until migration time, even until now. But today I have been watching a mourning dove flying debris it has collected from my yard in and flying out the tree. The Robin standing on the ground near by, watching. I would rather have robins for pest control reasons. Is it possible they can nest so close with each other?
-I am having a hard time finding the perfect category for this question.