This area was named by Vancouver when he passed the area in the 1700s and it was named after the huge number of paper birch trees located there. I am thinking it should have been named Big Leaf Maple as we saw much more of those than the paper birch.
The State Park is noted for its birding as it's on the Pacific Flyway. We saw a number of species, but as it was pretty late in the year, not hundreds like we had hoped. The regulars were there though, gulls and loons, geese and ducks and we enjoyed just sitting on the logs and watching them watch us.
The park as a Terrell Marsh Interpretive Trail that was about a mile long and we heard a woodpecker but couldn't see him/her in the canopy of trees