Nietoperze tworzą największe zgrupowania zwierząt kręgowych na Ziemi. Równie intrygujące jak rozmiary tych kolonii są mechanizmy doprowadzające do ich tworzenia i utrzymywania.

Bats form the planet's largest colonies of vertebrates. The complex mechanisms governing their giant colonies' creation and continuation are just as intriguing as their size.

Because bats live clandestine lives, many of their customs remain understudied. Yet research has uncovered that their criteria in choosing homes are very similar to those of humans: they prefer dry, sturdily built, warm and safe places to live.