Jane Austen's works deal with class in 18th-century England.

There were red-tailed cockatoos, casuarina cockatoos, a little corella and a galah.

Fairy-shrimps are primitive crustaceans, most of which live in temporary ponds, roadside ditches, or marshes that dry up in sumer. They lay thick-walled eggs that withstand summer drying and winter freezing, lying dormant in the mud until they hatch out as naupliuses when wetted by the first heavy spring rain.

demonstrable with empirical evidence