Yahweh making it possible for his people to return to his land is spoken of as if he were calling to his people. (See: [[rc://en/ta/man/translate/figs-simile]])
They will come home quickly as a bird returns to its nest. "Trembling" may refer to the fluttering of a bird's wings. It may also signal the people's feelings of humility and reverence for God (See: [[rc://en/ta/man/translate/figs-simile]])