Swamp Stomp

Volume 18 Issue 20

We know that light in the visible spectrum is necessary for humans to be able to see. Since our eyes are able to observe only a relatively limited number of wavelengths on the entire light spectrum, we must rely on artificial lighting to guide us when the sun is down or we are in enclosed areas with no additional lighting. However, many other animals in our world use light in different ways. Some we know about and some have yet to be discovered. The Atlantic Puffin is just one example of an organism that utilizes light in a very interesting way.

Jamie Dunning, a research student at the University of Nottingham, was more than surprised to turn on a black light over a deceased Atlantic puffin and discover that its beak glowed. Now, the Atlantic puffin is considered to be one of 180 animals considered “biofluorescent,” meaning they reflect blue light and reemit another color—the most common being green, red, or orange.
This is different from bioluminescent animals who are able to create their own light which they emit through chemical reactions in their bodies. In other words, biofluorescent animals use light and bioluminescent animals create light.

Most of the animals that are able to be used or create light live in the world’s largest habitat: the ocean. Animals like fish and squid that live so far below the ocean’s surface where light cannot reach, use light in a variety of ways. Most of the time, light is used as a way of defending oneself from a predator. Deep sea squids use light to startle and distract predators before they quickly dart away back into the darkness. Other creatures, such as dinoflagellates, light up to summon a predator of the predator attempting to eat them. Additionally, some species of shrimp and dinoflagellates, who live near the surface of the water, may light up to blend in with the silhouettes created in the water by the sun at dusk. This makes these creatures invisible to predators, as their light matches the light on the water.

But why would a puffin’s beak light up? Tony Diamond, an ornithologist at the University of New Brunswick, had observed the same glowing orange light from a deceased puffin as Dunning, so they have put their data together. Right now, the team is aiming to discover whether living puffins also have glowing beaks, but they had to develop “puffin sunglasses,” first, so as not to harm the puffin’s eyes under the blacklight. The team hopes to be able to observe whether the beaks glow on live birds and hopefully discover why the beaks glow. Is it for the purpose of preventing predation or is it something else? This question has no answer yet, but researchers are hoping to find this out soon.

Sources:

Arnold, Carrie. “Puffin Beaks Glow in Surprising Discovery.” National Geographic National Geographic. 27 April 2018. Web. 4 May 2018.

Judson, Olivia. “Luminous Life.” National Geographic. National Geographic. March 2015. Web. 4 May 2018.