Greetings @katleya, it must not be easy to emigrate, part of your story and experiences are anchored to the place you leave, these birds had everything in their new home, but still missed their life in the warm island and as you mention "the affections left in other places break the heart" and cause nostalgia a part of the being wants to return and reconnect with its origin. 😀 🌺🌼
Have a nice day!