Often we think that different species occupy different ecological niches. However, this apparently simple issue has remained highly controversial till today. Mark McPeek argued in this paper in American Naturalist that ecologically equivalent species (dragonflys in his empirical example), exploiting the very same niche, can arise via convergent evolution. With Liz Pásztor and György Barabás we demonstrated that such convergence is highly unlikely. We had a very good discussion with Mark. Our reply has been accepted in the same journal. https://doi.org/10.1086/707610, Preprint