Play: Cockatiels love to play, and tearing paper can provide both entertainment and a source of enrichment.
Nesting: Cockatiels in the wild tear up and weave bits of paper, bark, and other materials into their nests for warmth and comfort. Domestic cockatiels might engage in similar behaviors even when they don't have a nesting site to prepare, simply out of instinctual habit.
Curiosity: Cockatiels are curious and exploratory birds. Tearing paper might simply be a way for them to explore and investigate their surroundings.
Attention: If your cockatiel starts tearing paper when you're in the room, it could be a way of seeking attention. They may have learned that this behavior gets your attention, so they repeat it to interact with you.
Boredom: A bored cockatiel is likely to engage in various destructive behaviors, including tearing paper. Make sure your cockatiel has plenty of toys, interactive objects, and social interaction to prevent boredom.
Communication: Cockatiels sometimes use tearing paper as a form of communication. They could be expressing excitement, contentment, or frustration.
It's important to understand the reasons why your cockatiel is tearing paper before attempting to stop or redirect the behavior. If it's a matter of boredom or a desire for attention, providing them with alternative activities or spending more time with them can help. If the behavior is persistent and disruptive, you might need to consult with a veterinarian or animal behaviorist for specific strategies to discourage paper tearing.