title: Pollinators in high-elevation ecosystems: relative effectiveness of birds and bees.
abstract: During the rainy season bird-flowered plants at high elevations are more effectively pollinated than closely related bee-flowered plants. With good flight conditions the effectiveness of birds and bees is essentially equal. Thus, the higher incidence of bird flowers at higher elevations is attributable in part to the competitive advantage gained through greater reproductive success.
authors.forename: R W
authors.initials: RW
authors.lastname: Cruden