On a Throne of Leaves

I went back to Seneca Creek Park today in search of birds.  Last time, Suzanne and I felt like we were shooting fish in a barrel, there were so many bluebirds, woodpeckers, etc.  Today I had to hunt down every chirp.  Where did they all go?  Anyway, I was able to get a blip of what I think is a female Purple Finch.