>>984759Depends on the cat and the bird. Some cats have a really high prey drive, others don't. Some birds are terrified of cats, others don't give a fuck. Getting both when they're young, or old enough to know their personalities (e.g. through adoption) can help.
>Also i hate spiders and pests are sprayed pesticides really dangerous to birds?Depending on the pesticide, yes. And to you. And the cat. Are you really old enough to own a house? Where do you live that you expect your home to be flooded with insects and arachnids?
>>984774>leave them aloneYou're never going to leave the bird alone, outside of the cage, with the cat in the same room. Never. No matter how well they get along. They are animals, and while you can predict their behavior you never know what may happen.
It's part of your responsibility to find a good, sturdy cage that can withstand a cat's curiosity, and to place it in such a location that it will not be easily climbed or knocked over.