SUBSCRIBE TO MY YOUTUBE CHANNEL & HELP SUPPORT BATS

How Bats Actually Fly to Find Their Prey


New research, complete with night-vision video recordings, helps elucidate how bats actually fly to find their prey.

Every night a bat puts in 600-700 kilometres of airtime. Flying low, the animals catch insects at speeds of around 40 metres per second. At night the bat uses its hearing to navigate its way to prey. Bats catch insects continuously using echolocation, an advanced navigation system.

The bat emits ultrasonic waves with very high frequencies. Its calls are pitched at 20-100 kilohertz, a frequency that is too high-pitched for humans to hear naturally. Their sounds are reflected in the environment, hitting various objects and returning to the bat as echoes. The echo signals enable the bat to form a mental map of its surroundings.
Like using a flash
According to Nadav Bar, an associate professor at the Norwegian University of Science and Technology's Department of Chemical Engineering who has recently researched bats, "You can compare echolocation to using a flash in a dark room. The flash hits various objects in the room that light up and are reflected back to the eye of the observer. The bat uses sound in the same way to get an overview of the environment, but the potential sources of error are far greater when using sound."

Different daytime flying pattern When bats on rare occasions fly during the day, they use their vision to navigate and fly in a straight line to their destination.

Night-time flights are more elaborate than daytime ones. Bats continuously rise and dip in curved flight trajectories, using large movements to propel themselves.

Filtering out noise
Noise from rain, wind and snow disrupts echo signals, making it harder for the bat to form a picture of its surroundings. The bat's big night-time movements also generate sound that disturbs the echo signals.

But bats manage to catch their targeted prey despite poor weather conditions. Bar has recently researched how this is possible.

"Bats are able to filter out the ambient noise around them using low-pass filtering. Useless sounds are cleared out, which makes conditions more transparent. The bat also has a highly developed sensorimotor system, which controls the mammal's movements. These characteristics enable the bat to move quickly and with incredible precision," says Bar.

Measure the angle en route
Bats are more careful in their movements at night than during the day, and they are always at the ready to change direction quickly to avoid impending danger. Bats also have the very useful navigational ability to measure how fast the flight angle is changing as they approach their targeted prey.

Bar performs all his bat research abroad. He has been in Israel, the USA, Germany and Poland. Bats are nocturnal and often inhabit caves or unoccupied buildings, making them difficult-to-access research subjects. Research laboratories also need to be large enough for bats to fly around.

Bar is responsible for education in the new master's programme in Systems Biology in NTNU's Department of Chemical Engineering. Students in this program learn to model, create simulations and study the animal world, bacteria and genetics. Bar was lead author of an article about how bats fly published in PLoS Biology.




Video: https://www.youtube.com/watch?v=ztofILRVJy8

Story Source:
The above post is reprinted from materials provided by The Norwegian University of Science and Technology (NTNU). The original item was written by Synne Merete Mæle. Note: Materials may be edited for content and length.

Journal Reference:
Nadav S. Bar, Sigurd Skogestad, Jose M. Marçal, Nachum Ulanovsky, Yossi Yovel. A Sensory-Motor Control Model of Animal Flight Explains Why Bats Fly Differently in Light Versus Dark. PLOS Biology, 2015; 13 (1): e1002046 DOI: 10.1371/journal.pbio.1002046

COMMENTS

BatsRule!/\^._.^/\Help Save WildLife
Name

Articles,62,Audio,16,Backyard,16,Barbed Wire,27,Bat Art,45,Bat Books,83,Bat Box,26,Bat Clothing,16,Bat Issues,570,Bat Stamps,1,Bats,2,Bats for Children,35,Bats for the Home,68,Electrocution,8,Events,38,info on bats,557,Jackie Sparrow,22,Microbats,457,Misc,100,Netting,35,Newsletter,4,Promoting,141,Rehab,76,Rehab 2011,6,Rehab 2012,24,Rehab 2013,17,Rehab 2014,6,Rehab 2015,104,Rehab 2016,117,Rehab 2017,45,Release Cage,2,RESCUE,64,Rescue 2012,4,RESCUE 2013,18,RESCUE 2014,8,RESCUE 2015,25,Rescue 2016,14,RESCUE 2017,10,Rob Mies,11,Shooting,2,Vegetation,23,Video,298,Virus,128,WebSites-Bat,44,
ltr
item
BATS. Megabats, Flying-foxes, Fruit bats and Microbats: How Bats Actually Fly to Find Their Prey
How Bats Actually Fly to Find Their Prey
How Bats Actually Fly to Find Their Prey
https://4.bp.blogspot.com/-cV1qNKVVfSQ/Vr4_8cCFsLI/AAAAAAACMqs/pAPVgotDQQg/s1600/How%2Bbats%2Bactually%2Bfly%2Bto%2Bfind%2Btheir%2Bprey.jpg
https://4.bp.blogspot.com/-cV1qNKVVfSQ/Vr4_8cCFsLI/AAAAAAACMqs/pAPVgotDQQg/s72-c/How%2Bbats%2Bactually%2Bfly%2Bto%2Bfind%2Btheir%2Bprey.jpg
BATS. Megabats, Flying-foxes, Fruit bats and Microbats
http://batsrule-helpsavewildlife.blogspot.com/2016/02/how-bats-actually-fly-to-find-their-prey.html
http://batsrule-helpsavewildlife.blogspot.com/
http://batsrule-helpsavewildlife.blogspot.com/
http://batsrule-helpsavewildlife.blogspot.com/2016/02/how-bats-actually-fly-to-find-their-prey.html
true
4238281482117672351
UTF-8
Loaded All Posts Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS CONTENT IS PREMIUM Please share to unlock Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy