The Pacific Tree Frog, also known as the Pacific Chorus Frog, is both Oregon’s smallest and most common frog. Pacific Tree Frogs breed from February to August. Adult males produce a variety of calls in the breeding chorus including a two-part advertisement call, “rib-it” or “crek-ek,” an enhanced male attraction call, and a trilled encounter call. The choruses are audible from great distances. The Pacific Tree Frog is common throughout the Tualatin River Watershed.
