A measure of how successful a bird is at food acquisition, quantified through observations as foraging rate (number of forages divided by time observed)
The identity and relative abundance of species within an ecological community
The tendency for related species to resemble each other more than expected by chance, measured by Blomberg's K and Pagel's lambda
Diet breadth of bees classified as oligolectic (collect pollen from flowers in multiple plant families) or polylectic (collect pollen from flowers in just one family)