The link between range size, niche specialization, and diversification in one of the most successful avian radiations, the New World flycatchers (Tyrannoidea)

Dataset including the following information for each species: Diversification rate (DR) Number of occupied ecoregions following criterion I (Index) Number of occupied ecoregions following criterion II (Index2) Min. elevation (MinElev) Max. elevation (MaxElev) Mean elevation (MeanElev) Elevational range (RangeElev) Geographic range size (RangeSize) Hand-wing index (HWI) Body size (mass)