Fig. 3.

Observed and expected nectar depths in relation to proboscis lengths of pollinators based on species (A) or individuals (B). Each data point corresponds to a single pollinator species (n = 111) and is shown as the mean nectar depth of flowers visited by that pollinator (filled circles) ±1 s.d. (vertical lines), along with the mean depth predicted by the appropriate (species-based or abundance-based) model (open triangles). The threshold line is the line at which nectar depth equals proboscis length.