The German historian of medieval thought, Kurt Flasch claims in one of his books ("Das philosophische Denken im Mittelalter", my translation "philosophical thought in medieval times") the following:
"If there was any interest in natural history, in botany or mineralogy, for example, people looked for explanations in Pliny's Naturalis Historia."[^1]
I'm wondering if you can think of other works that were available and actually used by medieval natural historians/philosophers. Was aristotle (or at least his natural history) not available to people in the (european) middle ages?