He just stopped mowing his lawn, and after a few years, he had some grad students come, and they did sort of a bio-blitz of his backyard, and they found 375 plant species, including two endangered species.
Smise di tagliare il prato e dopo qualche anno  alcuni suoi studenti andarono a fare una sorta di bio-blitz  nel suo cortile, e trovarono 375 specie vegetali, tra cui due specie in pericolo.