Figure 22.13 Reproductive Isolating Mechanisms May Be Mediated by Species Interactions (A) This hummingbird’s morphology and behavior are adapted for feeding on nectar from pendant flowers. (B) The nectar-extracting proboscis of this hawkmoth is adapted to flowers that grow upright. (C) Aquilegia formosa flowers are normally pendant and are pollinated by hummingbirds. (D) Flowers of A. pubescens are normally upright and are pollinated by hawkmoths. In addition, their long floral spurs appear to restrict access by some other potential pollinators.