Good question. Come to think of it, maybe not all that much. Maybe some. Something that you cannot measure in terms of figures is how much you contributed to nurture younger generations. That you cannot scientifically measure. In terms of animal care, and the observations, I have lived some, such as institute duck migration in the midst of Tokyo in a zoo lake during the 60s, and that is one, in a broader prospective. Similar to the red tailed hawk parental behavior, that I did in Indianapolis Zoo, later became my master’s degree thesis, and also published from Germany in 1981.