TIL That owls fly silently due to specially designed edges of their primary feathers. When most birds fly, turbulence from air gushing over their wings creating noise. However, owls have their primary feathers serrated like a comb, which divides turbulence into tiny currents aka micro-turbulences.

http://animals.howstuffworks.com/birds/owl-fly-silently1.htm



Submitted February 26, 2015 at 08:28PM by Billy-Orcinus http://www.reddit.com/r/todayilearned/comments/2x8jj0/til_that_owls_fly_silently_due_to_specially/