May is the perfect time for spotting spring’s ephemeral wildflowers, for catching sight of birds beginning to nest, and for exploring the banks of the Wissahickon Creek in search of reptiles and amphibians. Come stroll through Four Mill’s floodplain forest, and see what you can find!

• Free; registration not required
• Four Mills Nature Reserve; WVWA Headquarters, 12 Morris Road, Ambler 19002