Bat wing hairs

["Richard W. Travsky" <rtravsky@uwyo.edu>]

http://www.nature.com/news/2011/110620/full/news.2011.376.html

Bats use tiny hairs to sense the speed and direction of air flowing over 
their wings. This may alert them to the danger of stalling and enable them 
to perform impressive aerobatic tricks, according to a report published 
today in the Proceedings of the National Academy of Sciences1.
[...]

Just out curiousity, have hair like structures been noted in any pterosaur 
(and the like) impressions?