Bats can be badasses. Behold the greater noctule. http://www.mammalwatching.com/Palearctic/Images/Hungary/Nyctalus%20lasiopterus%20jmB.jpg [![enter image description here][1]][1] These bats fly high into the air at night and catch birds on long term migrations. The birds are flying blind at night and never know what hit them. http://www.pnas.org/content/98/17/9700.full I say go with bats. [1]: https://i.sstatic.net/f7tlT.jpg