Something not mentioned is that Austen lived very close (c. 2 hour walk away) to the home of Rev Gilbert White, who many regard as the world's first naturalist.
His method of detailed observations of common animals, insects and plants living in their natural habitats (rather than dead in cases) was quite revolutionary in its day, became popular in the scientific world at that time and almost certainly influenced indirectly Darwin's own studies. He even wrote a detailed study of earthworms, something Darwin did later famously, though there's no suggestion of direct influence.
It would not be a surprise if Austen became well acquainted with the works of a famous local "celebrity" as White as well.