The number of species within each of the 15 functional groups defined by both diet and foraging strata, used in the analysis of functional homogenization.

By using this method species with the same diet but different foraging strata were in different groups and vice versa. Each cell represents a unique functional ‘role’ or niche. Blank (–) cells represent niches with no members, whilst cells with a value of ‘0’ represent niches unfilled by the local avian assemblage.