Do all birds have brains

Think for a minute. If you were an animal, (even though we kinda already are) would you have a brain? Of course! All animals have brains, and they are all smart in their own ways, even if you think they are acting stupid.

The answer posted above is not true. There are animals without brains. Single-celled animals such as paramecium and amoeba do not have brains. Also corals, jellyfish starfish, sea urchins, sand dollars, and more do not have brains. So the answer to your question would be that most animals have brains, but there are definitely some animals that do not.