This is an ethical dilemma involving the need for survival and environmental protection. In extreme living environments, preserving one's own life is the primary consideration. If you are indeed facing the threat of hunger and have no other source of food, international law and most ethical frameworks recognize that people have the right to take necessary actions to protect themselves in an emergency. However, I suggest you consider the following points： 1. Have you tried all other possible food sources (such as fruits, plants, fish, etc.)? 2. This endangered bird may be protected by law, and it may be illegal to kill it in non-life-or-death situations. 3. Is there a possibility of asking for help or leaving the island? If you really have no choice, it is recommended to take only the minimum necessary amount and seek other sustainable food sources and rescue methods as much as possible.