Sula nebouxii

Posted 10 November 2008 by

by Mike Zerella, University of Colorado
Sula nebouxii --- Blue-Footed Booby, Galápagos Islands.

17 Comments

Stanton · 10 November 2008

Nothing lifts the spirits quite like watching a pair of big boobies sitting pretty.

wright · 10 November 2008

Some animals are compelling in their beauty, others in their ugliness. Of course those terms are highly subjective; I don't find many animals too unpleasant to look at. The boobies I find attractive by virtue of being exotic to me: their wonderful blue feet and pale eyes.

Stanton · 10 November 2008

wright said: Some animals are compelling in their beauty, others in their ugliness. Of course those terms are highly subjective; I don't find many animals too unpleasant to look at. The boobies I find attractive by virtue of being exotic to me: their wonderful blue feet and pale eyes.
Have you seen the red-footed booby?

Mike Z · 10 November 2008

Does anyone know of any hypotheses concerning the adaptive value of the blue feet?

Mike Z · 10 November 2008

...and by the way, their mating ritual is really spectacular as well. They do a beautifully choreographed song and dance number.

Richard Simons · 10 November 2008

Mike Z said: Does anyone know of any hypotheses concerning the adaptive value of the blue feet?
I would guess through sexual selection, the brightness of the feet being an indicator of the health of the individual.

Stanton · 10 November 2008

Mike Z said: Does anyone know of any hypotheses concerning the adaptive value of the blue feet?
Besides what Richard Simmmons said, the blue feet could be a form of species recognition to enable a blue-footed booby to tell each other apart from red-footed and masked boobies.

Mike Z · 10 November 2008

Sexual selection certainly makes sense, but I thought I'd ask just to be sure that wasn't a more unusual reason for such an unusual characteristic. BTW, part of their mating dance involves slowly lifting up one foot at a time and stretching it out to the side--sort of like a slow-motion karate kick. Maybe that looks sexy.

Paul Burnett · 10 November 2008

The two birds pictured have different color feet - one a uniform pastel light blue, and the other a mottled purplish-blue. Is that a gender difference, or age, or what?

Mike Z · 10 November 2008

I'm pretty sure it's gender. Just off frame to the left is the little baby booby. Not so little, actually. You can see its beak and a little bit of its downy feathers, apparently staring at mom's (dad's?) feet.

John · 11 November 2008

boobies do not have boobies, do these boobies belong to Pam Anderson?

Frank J · 11 November 2008

Paul Burnett said: The two birds pictured have different color feet - one a uniform pastel light blue, and the other a mottled purplish-blue. Is that a gender difference, or age, or what?
Or different "kinds"? ;-)

Mike Z · 11 November 2008

John said: boobies do not have boobies, do these boobies belong to Pam Anderson?
No, but Pam Anderson does have blue feet (little known fact).

eric · 11 November 2008

Wikipedia says their conservation status is "least concern." Least concern? That can't be right. The planet clearly has too few boobies on it.

Henry J · 12 November 2008

The planet clearly has too few boobies on it.

Oh, can I resist giving the obvious punchline to that...

megan · 13 November 2008

Yay, one of my favorite animals! Because their name sound risque, but they're not.

Stanton · 13 November 2008

megan said: Yay, one of my favorite animals! Because their name sound risque, but they're not.
I take it, then, you've never seen the finale to the various booby species' mating dances, then?