This is how bats can land upside down
This is how bats can land upside down How do bats land upside down? (Daniel Gerd Poelsler/imageBROKER/Corbis/Wisconsin Department of Natural Resources via AP, File)
This is how bats can land upside down
Lexile: 920L

Assign to Google Classroom

When you think of a bat, chances are you're imagining it hanging upside down. It might hang from a tree branch or a cave ceiling. Now, scientists have figured out how bats effortlessly pull off this stunt. That is according to a study. It was published in PLOS Biology.
"Bats land in a unique way," Brown University biologist Sharon Swartz, said in a statement. "They have to go from flying with their heads forward to executing an acrobatic maneuver that puts them head down and feet up. No other flying animal lands the same way as bats do."
Relative to their body weight, bats have some of the heaviest wings in the animal kingdom. That seems like it would increase the difficulty of these gymnastic feats.
Bats also have to deal with having solid bones. This is unlike birds. The bones and joints of birds are hollow. But instead of being kept down by their weight, bats use their relatively heavy bodies to their advantage. They fling their bodies around. It is similar to how skateboarders and figure skaters pull off kick flips and pirouettes. This is according to Nsikan Akpan for the PBS Newshour.
To figure out how bats pull this trick off, Swartz teamed up with Brown University engineer Kenny Breuer. They studied the bats' landings. To do it, they used a high-speed video camera. They slowed down the bat's flight. They realized that the furry fliers directed their body's inertia by tucking in one wing and keeping the other extended. It shifted their center of gravity. That allowed them to flip around despite their weight.
"I would imagine that they use inertial forces for every aspect of their maneuvering," Breuer tells James Owen for National Geographic. "We don't have any direct evidence of this yet."
Birds can fly upside down and have lighter wings. But bats are more nimble fliers. That is thanks to having many more joints and muscles in their wings. This allows them to pull off deft movements using their own inertia very quickly. In Swartz and Breuer's experiment, it took the bats less than a second to flip upside down for their landings. It suggested that what they lack in aerodynamics, they make up for in mastering their own inertia, Akpan reports.
"It never would have occurred to me that aerodynamics would play such a small role in landing. I always think of flight as a primarily aerodynamic phenomenon. Wings are aerodynamic organs, and landing seems so obviously to be a flight behavior," Swartz tells Akpan. "Inertia can play an important role in flight dynamics, but the relative unimportance of aerodynamics is still quite astonishing."
Knowing how bats turn their body weight to their advantage doesn't just give scientists new insight into how they fly. It might also help engineers design new drones and small flying vehicles that can take advantage of shifting their mass in exchange for better control. But for now, Swartz and Breuer want to find out whether all bats use their inertia to help them control their landings.
"In Central America, there are some bats that roost head up thanks to suction disks on their wrists and ankles. They roost inside furled up leaves in tropical forests," Swartz tells Akpan. "They don't end up upside down. So how do they land? There's almost 1,400 species of bats, and we've just scratched the surface."

Source URL:

Filed Under:  
Assigned 722 times
Why are birds' bones hollow?
Write your answers in the comments section below

  • justinp1-sto
    10/20/2016 - 02:21 p.m.

    this was intresting how they can do that

  • plaura-dav
    10/20/2016 - 03:55 p.m.

    4.The blank version below can be copied and pasted

    In response to " this is how bats hang upside down," I disagree that this is true because not all bats hang upside down the same way. One reason I agree is that most bats hang the same way. Another reason is that the people that said this are scientists who study bats. It says in the article that bats hang upside down a lot . A third reason is that bats hang upside down a lot. Even though some people do not believe this , I think
    It is true.

  • dmatthew-dav
    10/20/2016 - 09:28 p.m.

    In response to "This is how bats can land upside down," I think that this is extodanary . One reason it is extrodanary is that they do it the whole day. Another reason is that aerodynamics has to do with landing. It says in the article that the bats hearing is incredible A third reason is their bones are hollow like a birds Even though it is simple, I think it is extrodanary.

  • cjoseph-dav
    10/20/2016 - 09:51 p.m.

    In response to " When you think of a bat," I agree/disagree that bats land in a unique way. One reason I agree/disagree is that bats are cool to study. Another reason is that according to their body weight the have the heaviest wings in the animal kingdom. It says in the article birds can fly upside down and have ighter wings(more details). A third reason is knowing how bats turn their body weight to their advantage doesn't just give scientist new insight on how thy fly. (more details). Even though scientists are still trying to figure out how they fly, I think that article is pretty cool

  • loganm1-dav
    10/20/2016 - 10:10 p.m.

    In response to " This is how bats land upside down" I think that is is very encouraging to see that researchers are still discovering new things about animals. One thing that is interesting is that bats wings are very heavy but they are very aerodynamic. This is cool because a creature as small as a bat can use their body weight to help them. We need to know these things in case their is anything to learn from this that we might need in the future. Bats are very intelligent creatures and it's great we know more about them.

  • daltons1-ste
    10/21/2016 - 08:19 a.m.

    Bats are weird. They look weird and land weird. Bats are pretty amazing considering how they have to land.

  • dshiver5-sam
    10/21/2016 - 11:01 a.m.

    Bird bones are hallow because lihgter that's how they fly. That's why there bones are hallow for lighter weight and that lighter weight helps them fly

    • lreed803-eva
      10/25/2016 - 09:51 a.m.

      That is why birds fly so good.

    • nsrou648-eva
      10/25/2016 - 01:48 p.m.

      The birds bones hollow because it lighter weight and lighter weight help them to fly.

    • pwhor018-eva
      10/25/2016 - 01:51 p.m.

      I agree!! Because birds have to have hallow bones because if not they won't be able to fly as high.

Take the Quiz Leave a comment