JUN 02, 2017 07:43 AM PDT

Why Did the Galapagos Cormorant Lose its Ability to Fly?

It’s generally atypical for birds of flight to lose their ability to soar through the air, so we have very little evidence of this phenomenon actually occurring. With that in mind, even some of the best scientists aren’t really sure what causes it to happen.

There are several species of Cormorant around the world, but only the kind native to the Galapagos (Phalacrocorax harrisi) seem to have lost their ability to fly to unknown reasons. Given the circumstances, they seem to be a great test subject for learning more.

Most cormorants can fly, but the Galapagos cormorant is the lone exception.

Image Credit: winterseitler/Pixabay

A new study has been published in the journal Science and aimed to figure out why these creatures are unable to take flight today despite what appears to be a past filled with flight.

Related: Study finds that some birds are able to sleep while flying

To get a scientific explanation, the researchers took to the Galapagos themselves and took several blood-based genetic samples from the creatures to compare with other Cormorant species found around the world.

What they found was evidence for genetic mutations in the Galapagos breed that are known to cause skeletal problems in humans. These are known as ciliopathies and are known to cause problems with not only limbs, but also ribcages, and even skulls.

The possibility that this genetic mutation could be linked to the Galapagos Cormorant’s significantly-smaller wings seems like too much of a coincidence to be taken at face value. This could be the missing link researchers were looking for, but it’s still nevertheless a hypothesis.

Related: Flocks of birds use 'beautiful physics' to save energy

In addition to the smaller wings, Galapagos Cormorants also have significantly smaller sternum muscles, which means they don’t have as powerful of a wingbeat as alternatives species do. These two handicaps, paired together, seems to have deprived these birds of their flight capabilities.

Even though it seems like a pretty good match, some experts believe the researchers could have dug deeper into the animal’s genetics to learn more about the specifics. Nevertheless, even the researchers involved in the study admit that they could have done better, citing that future advances in technology may help answer the ongoing question.

“The ideal experiment would make a Galapagos cormorant fly or another cormorant not fly,” study co-author Leonid Kruglyak says. “As technologies improve, we can imagine testing these gene mutations in birds and watching the wings develop.”

Perhaps the most logical explanation to date for the Galapagos Cormorant losing its ability to fly has to do with its isolation in the middle of nowhere. Here, the creature doesn’t have to have to take flight to avoid predators, and this means they’re not using their flight muscles as much as other species would.

It should be interesting to see if any other researchers can challenge the new theory and find any new details as the technology for investigating this sort of thing becomes more advanced.

Source: ScienceMag

About the Author
  • Fascinated by scientific discoveries and media, Anthony found his way here at LabRoots, where he would be able to dabble in the two. Anthony is a technology junkie that has vast experience in computer systems and automobile mechanics, as opposite as those sound.
You May Also Like
AUG 24, 2018
Earth & The Environment
AUG 24, 2018
What's the deal with Florida's red tide?
Have you ever seen a red tide? If you live in Florida near the coast, it’s unlikely that you’ve been able to avoid them. But do you really unde...
SEP 11, 2018
Plants & Animals
SEP 11, 2018
21 'New to Science' Parasitoid Wasps Described in Study
Those who observe nature for a living are bound to happen upon captivating discoveries. For a team of North American researchers, that apparently meant ide...
SEP 17, 2018
Plants & Animals
SEP 17, 2018
Luck Enabled Scientists to Monitor a Leatherback Sea Turtle Throughout Hurricane Florence
If you’re a sea turtle, and a hurricane is headed right for your turf, what do you do? Scientists can loosely answer this question thanks to years&rs...
SEP 18, 2018
Plants & Animals
SEP 18, 2018
Study Investigates Why People Like Bees and Dislike Wasps
Bees and wasps share a lot in common; the clear majority of both sport the familiar black and yellow color scheme, retain unpleasant stingers for self-defe...
OCT 23, 2018
Plants & Animals
OCT 23, 2018
Will This Technology Prevent Future Shark Attacks?
  The frequency of great white shark attacks is thought to be over-estimated by a magnitude of 10 to 100 times, but despite what any shark expert want...
NOV 20, 2018
Plants & Animals
NOV 20, 2018
Stomach of Deceased Sperm Whale That Washed Up in Indonesia Was Filled with Plastic
When a deceased sperm whale washed up on the shore of an Indonesian park, officials sought expert help for answers. Not long after, a necropsy procedure re...
Loading Comments...