When food is scarce, the stringent territorial system may be abandoned and as many as three pairs may occupy a single territory.
wˌɛn fˈuːd ɪz skˈɛɹs, ðə stɹˈɪndʒənt tˌɛɹɪtˈoːɹɪəl sˈɪstəm mˈeɪ biː ɐbˈændənd ænd æz mˈɛni æz θɹˈiː pˈɛɹz mˈeɪ ˈɑːkjʊpˌaɪ ɐ sˈɪŋɡəl tˈɛɹɪtˌoːɹi.