当光线较弱时，非洲蜂的视力比本地麦蜂要更好，因此它们在晚上觅食更有优势，而白天的花朵则被本地麦蜂所霸占。
Their ability to see in slightly lower light than native stingless bees gives the honeybees a competitive advantage at night. Earlier in the day the natives often block access to flowers.
这样可以使叶片边缘避免受到正午阳光的直接照射，同时在早晚还可以充分利用东西方向较弱的光线。
Such plants thus avoid receiving the strong midday rays of the sun directly on the leaf blades, but are positioned to use fully the weaker rays of the morning and evening sun from the east and west.
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