If you’ve stumbled on clusters of small, bright pink eggs in your garden, they may look festive or even harmless. But be careful—these pink eggs are actually the work of the invasive apple snail, a species that poses a serious threat to local ecosystems. Originating from South America, these snails have spread globally, wreaking havoc on plants, crops, and natural habitats wherever they establish themselves.

Apple snail, a freshwater mollusk, is much larger than the snails you might typically find in a garden. With a shell that can reach up to ten centimeters in width, the apple snail is an impressive, if intimidating, sight. They thrive in wet environments such as ponds, lakes, and swamps, where they can easily spread, especially in warmer climates.

Apple snails lay clusters of pink or orange eggs, each around 2-3 millimeters in diameter. These eggs often appear in groups of 400 to 600, a testament to the prolific breeding habits that make the apple snail such a successful—and dangerous—invader.