Original Chinese characters about animal contains:
牛 羊 马 豕 犬 虎 鹿 鼠 兔 鸟 虫 鱼 隹 飞……
These Original characters have changed to many more characters. You can find the path through the following mind map.
And then, you can begin to study these characters in this series, try to find the original compoent in the characters.