zugunruhe

enUK

zug·un·ru·he

or Zug·un·ru·he Z5033400 (tso͝ok′o͝on′ro͞o-ə)n. The migratory drive in animals, especially birds.
[German : Zug, a pulling, move, migration; see zugzwang + Unruhe, restlessness (from Middle High German unruowe, from Old High German unruowa : un-, not; see ne in Indo-European roots + ruowa, rest).]