Bat and Bat robot made on a 3-D printer that has the same proportions as those in real bats.
The work with this robot was done by Joseph W Bahlman et al 2013 at Breuer and Swartz labs/Brown University.
The article (featured) appears in the Journal Bioinspiration & Biomimetics Volume 8 Number 1.
image from Joseph W Bahlman et al 2013.