1. Attracting Attention: Cockatiels are known for their vocalizations, and singing is a way for them to communicate. If your cockatiel sings to your feet or shoes, it could be trying to get your attention. By focusing on your feet or shoes, it may be attempting to prompt you to interact or play with it.
2. Territorial Behavior: Cockatiels have a territorial instinct and may perceive their owner's feet or shoes as part of their territory. Singing to your feet or shoes could be a way of marking their territory and asserting their presence in that space.
3. Affection: Some cockatiels may develop close bonds with their owners and express their affection in different ways. Singing to your feet or shoes could be a unique way of showing affection or connection towards you.
4. Learned Behavior: If you have unknowingly rewarded your cockatiel's singing behavior towards your feet or shoes in the past, such as giving it a treat or pet, it may have learned that this behavior leads to a positive outcome and thus repeats it.
It's important to observe your cockatiel's overall behavior and interactions with you and its surroundings to better understand its intentions and any underlying motivations for its singing behavior. Each bird is an individual, and its behavior may vary based on its personality and unique preferences.