Definition of northern red-legged frog
:a large, long-legged frog (Rana aurora) native to western North America from British Columbia to northern California that is reddish-brown to greenish-gray with black spots and has red on the undersides of the arms, legs, and abdomen
- The northern red-legged frog has been so elusive in recent years that state wildlife officials placed it on the state “Sensitive Species List.”
- —Mike Stahlberg, Seattle Times, 11 Apr. 1999
