Dive summary:

• Florida is dealing with an outbreak of giant African land snails, which love hot and wet climates and calcium.
• The critters munch on 500 species of plants, but they also seem to adore stucco as a source of calcium for building their shells – and just to endear themselves even more, they can carry a form of meningitis.
• Florida officials say they think they have the snail contained in Miami-Dade County, where it seems to go after homes built in the '50s and '60s on small, neighborhood lots.

From the article:

At some of the locations we have collected 20,000 to 30,000 snails, while at other locations we may only find 10 or 15 snails. ...