 The river 's mouth has populations of Canada geese and swans . Other waterfowl include mallards , green @-@ winged teal , and goldeneye . The river supports Bald eagle and osprey populations , whose eyries can be seen high up in black cottonwood and dead conifers . Grouse , especially ruffed grouse , are numerous throughout the valley . 
 The river <a href='null_genetive' title='1'><mark>'s</mark></a>mouth <a href='got' title='2'><mark>has</mark></a> populations of Canada geese and swans . Other waterfowl include mallards , green @-@ winged teal , and goldeneye . The river <a href='uninflect' title='3'><mark>supports</mark></a> Bald eagle and osprey populations , whose eyries can be seen high up in black cottonwood and dead conifers . Grouse , especially ruffed grouse , <a href='drop_aux' title='4'><mark>are</mark></a>numerous throughout the valley . 
Da river  mouth got populations of Canada geese and swans . Other waterfowl include mallards , green @-@ winged teal , and goldeneye . Tdariver support Bald eagle and osprey populations , whose eyries can be seen high up in black cottonwood and dead conifers . Grouse , especially ruffed grouse , numerous throughout the valley .