I do not have the origional arabic, but I figured this is of interest:

'"Animals engage in a struggle for existence; for resources, to avoid being eaten and to breed. Environmental factors influence organisms to develop new characteristics to ensure survival, thus transforming into new species. Animals that survive to breed can pass on their successful characteristics to offspring."

al-jahith, book of animals.

I attach this, as it summs up EB nicely: change, adapt, or be conquered