Molossidae

The family of free-tailed bats (Molossidae) is a highly diverse family. Most of its representatives have a massive, robust appearance, and they are notable for their highly developed flying abilities.
In the southern and western United States is found the Mexican free-tailed bat (Tadarida brasiliensis) which forms huge colonies. The site at Bracken Cave is one of the most famous bat sites in the world, and many people come there every year to watch the spectacular emergence of the bats.
 

It is likely that two species of free-tailed bats are found in Israel, but one of the species has not yet been identified with certainty: 
Recordings made during the survey were passed on to professionals for identification; when opinions are received we will publish them here. For now, the only free-tailed bat species known in Israel to date is described here:
Common free-tailed bat