Buzz> Not the Stan, in the dredge tailings on the Merced.
However, at the Army Corps ranger headquarters at Knights Ferry on the Stan, I once picked up a pamphlet that had all the different bird species and what time of year one was likely to see 'em in the canyon there. It was fun to see how many different species one could ID on a drift down to O.B. Bridge.
When buzzards roost in the trees in the evenings, the next morning they will spread their wings out and dry off the sweat. Also, While waiting for the thermals to develop, they preen themselves and pick out any messed up feathers. Some older birds will just keel over right there. (don't fret U.C.)

So if you see where they roost, that's where you'll find many feathers. They are not very good nest makers. A few sticks grouped together on the ground is all they'll do.
I remember when G.M., Dawn and I floated the Arolik in Ak. a few years back, Dawn was on a bird ID hunt. I learned a lot of things from her about shorebirds. (Plovers!) That was a good float! Lots of good memories generated from this BB. Ya just kina gotta forget about the BS.
Here's an image I got a few minutes ago from my back deck. You can make out the dark shapes maybe. Scattered showers here now. They won't catch any thermals today!
