It has long been believed that the stork is an indicator of the state of environment. It settles where nature has not been yet destroyed by the man.
There are many popular beliefs about storks, because this bird is associated with prosperity, happiness and procreation.
Slavs and Balts considered the stork a symbol of prosperity and good fortune. So if a nest appeared on a village house, the owners could expect piece, health and a good harvest.
Old-timers believe that storks settle only with good, hardworking people and ignore homes of wicked and lazy people. A good video from the uzhinform.com.