Calvin Chang a.k.a. deswitch documented two species of spiderhunters at Bukit Tinggi, Malaysia, harvesting nectar from flowers. The image above (left) shows a Streaked Spiderhunter (Arachnothera magna) on an ornamental banana plant (Musa ornate). That on the right shows a Little Spiderhunter (A. longirostra) on a ginger plant. In both, the bill of the spiderhunter is covered with whitish pollen. As they visit one flower after another, they effect cross pollination.
According to Gill (2007), a flap covers and protects the nostrils of some birds, especially diving and flower-feeding species. The former needs to keep out water while the latter to keep out pollen from entering their nostrils.
Images by Calvin Chang.
Gill, F. B., 2007. Ornithology. W. H. Freeman & Co., New York. 758 pp.
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