It’s a highlight of any Galapagos Islands cruise experience — standing just steps from comical male blue-footed boobies as the honk, sway, whistle and dance their way to a mate. But it turns out that dancing ability may not be all it tales to impress a female.
According to a group of Spanish and Mexican researchers, the intense blue hue of the male bird’s feet is actually an external indicator of age and fitness for breeding.
