Official journal of the Netherlands Ornithologists' Union
|Goldstein H., Verbeek N.A.M., Eisikowitch D. & Yom-Tov Y. (1987) Sunbirds prefer to feed in the sun. ARDEA 75 (2): 293-295|
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The Orange-tufted Sunbird prefers to feed on Aloe flowers located in the sun and this preference is not related to either quantity or concentration of the nectar provided by the flowers. It is suggested that this preference is related to energy savings attributable mainly to direct solar radiation but also to higher ambient temperature in the sun.