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.
Simplemente dejó de cortar el césped, y después de unos años unos estudiantes de posgrado lo visitaron, e hicieron un estudio de su patio trasero, y encontraron 375 especies de plantas, incluyendo dos especies en peligro de extinción.