Wonderful and lovely: Why did Pearl's parents disappear?

There are three possible reasons for the disappearance of Pearl's parents:

1. Migration: Pearl belongs to migratory birds. Due to seasonal migration, her parents may leave their native land for other areas. In this case, Pearl's parents are likely to return to their original place in spring or autumn.

2. Predation: Pearl's parents may become food for other animals. If they live in harsh environment, if they are hunted by large carnivores or humans, they may become prey.

3. Illness/accident: Pearl's parents may die unfortunately because of illness or accident. Living in the natural environment, they will inevitably encounter similar accidents.

The above is just speculation. If you want to know more detailed information, you can collect more relevant information.