 The river 's mouth has populations of Canada <unk> and <unk> . Other <unk> include <unk> , green @-@ winged <unk> , and <unk> . The river supports Bald eagle and <unk> populations , whose <unk> can be seen high up in black cottonwood and dead conifers . <unk> , especially <unk> grouse , are numerous throughout the valley . 
