Excerpt - page 565: "... are Leopard Frogs apparently absent from many suable areas where Ranapalustris is widespread, whereas they occur abundantly with the Pickerel Frog ..."
Excerpt - page 218: "... ; Leu$-bradykinin from the North American Pickerel Frog (Ranapalustris); tryptophyllin-1 from the Mexican Leaf Frog (Pachymedusa dacnicolor); ..."