ALBANY, N.Y. (AP) — Volunteers in the Hudson Valley are preparing to document the annual breeding migrations of frogs and salamanders in a project led by the Department of Environmental Conservation.

DEC Commissioner Basil Seggos is encouraging drivers across New York to watch out for amphibians crossing roads as the temperature rises and the ground thaws.

The breeding migration of salamanders and frogs typically begins in mid-March and large numbers may cross roads in wetland areas on rainy nights with temperatures in the 40s.

More than 370 volunteers participate in the annual Hudson Valley Amphibian Migrations and Road Crossings Project. They have documented 20 species of amphibians and helped nearly 12,000 safely cross roads to woodland breeding pools.

They've also counted nearly 6,000 migrating amphibians killed by vehicles since the project started in 2009.