I am writing a book and want to create a bird one that is my one of my hero's. BUT, I need to make them (correct) I know all birds are different and depending on their weight, (everything) Is their wing span. Does anyone know, if there is such a table, WHAT their height, length and weight would determine what their wingspan ratio would be? I need this!!! I have many birds in my book, but i need too make them real. Not just fantasy.