After a long absence, short distance migrant starlings have started to return to Israel, a phenomenon that experts find difficult to explain. Watch a flock of synchronized starlings (known as a “murmuration”) form spectacular sights of dancing clouds in the skies of southern Israel.
http://www.jpost.com/Not-Just-News/AMAZING-VIDEO-A-flock-of-starlings-form-spectacular-flyover-in-Israels-sky-389818 https://www.youtube.com/watch?v=btC2OmiSR0s