Science. 1972 Jun 23;176(4041):1351-2. doi: 10.1126/science.176.4041.1351.
The efficiency with which several species of hummingbirds extract nectar was estimated by converting the rate of extraction of nectar volumes to the energy expended and the energy obtained from the nectar. The extraction rates depend on corolla and bill morphologies, and the extraction efficiencies depend, in addition, on the bird weight and nectar concentration. Differential extraction efficiencies can be exploited by plants to increase pollinator specificity.
几种蜂鸟提取花蜜的效率是通过将花蜜提取量的速率转换为消耗的能量和从花蜜中获得的能量来估计的。提取率取决于花冠和喙的形态，此外，提取效率还取决于鸟的体重和花蜜浓度。植物可以利用不同的提取效率来提高传粉者的特异性。
