Question: a man is not a bird to come and go with the springtime meaning?
Answer: Linda- (Miller 39): “Biff, a man is not a bird, to come and go with the springtime.” This is a metaphor and this is a comparison of a bird and a man and specifically Biff. Linda is trying to tell Biff that he can't just keep moving from job to job and that he should make a decision about his career.