Curiosity: Cats are also very curious creatures, and they may be drawn to birds simply because they are different. They may want to investigate the bird and see what it is. This curiosity can sometimes lead to a cat chasing after a bird, even if the cat doesn't intend to eat it.
Play: Cats also love to play, and chasing after birds can be a fun and stimulating activity for them. They may not necessarily be trying to catch the bird, but they may enjoy the chase itself.
Hunger: If a cat is hungry, it may be more likely to hunt for food, including birds. This is especially true for stray or feral cats who must fend for themselves.
Boredom: Cats who are bored may also be more likely to hunt for birds. This is because hunting can provide them with mental and physical stimulation.
Opportunity: If a cat has access to birds, it may be more likely to eat them. This is especially true for outdoor cats who have the opportunity to roam and hunt.
It is important to note that not all cats will eat birds. Some cats may not be interested in hunting, while others may be trained not to do so. However, it is important to be aware of the potential for your cat to eat birds, especially if you have an outdoor cat.