If Hitchcock's movie scared you, don't be afraid.  Frigate birds are harmless except of course for the occasional dropping.  Nonetheless, they along with other bird species can be an overwhelming sight at relatively untouched sanctuaries such as this one on Isla Genovesa in the Galapagos.  Though it looks upside down, I shot this pretty much straight up from under a cliff overhang while dodging those little white bombs raining down.
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