RENSSELAER FALLS -- Tom Langen, biology professor at Clarkson University, known for his work with road crossings for reptiles and amphibians, will lead a walk around the Indian Creek Nature Center’s wetlands from 9 to 11 a.m. Saturday, Oct. 6.

He will be taking a look at their ecological significance and their place in the larger landscape.

More info: Tom Langen, 268-7933, http://www.indiancreeknaturecenter.us/.