Pine Siskins are all over my area in northern Arizona. They are tiny song birds with sharp-pointed beaks, heavily brown streaked with yellow in the wings at the base of their forked tail feathers. Here are some Pine Siskin’s I saw in late summer among the wild sunflowers.
Here is a fun article about Pine Siskins from Audubon. https://www.audubon.org/news/-pine-siskin-finch-irruption-fall-2020