Even without seeing its trademarked blue feet, the Blue Footed Booby is instantly recognizable by its familiar profile and blue beak. This one was seated high on rock ledge in a grotto on the shore of Floreana Island. There are 20,000 pairs of Blue Boobies in the Galapagos, half the world's population. Were were in the Galapagos during the Booby's mating season -- this male opens his beak wide to send a shrill whistle, in hopes of finding a mate.