cornered bird
Literary or figurative term for a bird driven into a corner, often used in the proverb 窮鳥懐に入る (a cornered bird will fly into one's bosom), meaning that even a desperate creature will seek refuge with a person.
Do you know the proverb 'a cornered bird will fly into one's bosom'?
Thinking of the feelings of a cornered bird, one can understand the emotions of someone who has been driven into a corner.