• Stars appear behind a dramatic landscape of rocky mountains, rolling hills, and fields of grass

    Santa Monica Mountains

    National Recreation Area California

New Zealand Mudsnails (Potamopyrgus antipodarum)

New Zealand Mudsnails are so small, nearly 100 can fit on the surface of a dime.

New Zealand Mudsnails are tolerant creatures that can thrive in almost any shallow body of water. The snail accumulates in extraordinarily large densities, choking out other aquatic species and depleting primary producers, such as algae and phytoplankton. The snails can travel in the guts of birds, on hiking equipment and in contaminated waters brought by the shipping industry.

What can you do!

Leave behind all fishing and aquatic equipment used in areas harboring New Zealand mudsnails. Be sure to decontaminate fishing and hiking gear to prevent further spread when fishing or hiking in any aquatic environments.

Did You Know?

Watch the credits a the end of a film and you may discover how often national parks are used by the movie industry.

Unique vistas and cultural significance often draw filmmakers to National Parks. Paramount Ranch is the only place in the National Park System where you can see movie making in action at a historic movie ranch once owned by Paramount Pictures (1927).