Stock Photo - In a fascinating example of sexual dimorphism and plant-animal relationships: the male hummingbird with a larger body and short, straight bill pollinates this species Heliconia while the female is adapted to pollinate another. Aquatint etching by Bryan Poole, 2008

Stock Photo: In a fascinating example of sexual dimorphism and plant-animal relationships: the male hummingbird with a larger body and short.

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