The Galapagos snail — once collected by Charles Darwin — and South Africa's riverine rabbit are among 12,259 known plants and animal species facing extinction, according to the 2003 Red List of ...

According to the New York Invasive Species information website, full-grown adult giant African land snails can reach almost 8 inches (20 cm) long and 5 inches (13 cm) in diameter. Although they are ...