Maker 1959 Falco rusticolus May 21. Buteo regalis. One falcon seen with rough-leg high over area across river. We heard a cry & saw the 2 close together the Cyp. had apparently made a pair at the rough-leg. It then flew straight off upstream. There no an osprey up there about 2 miles. May 23. Visited eyrie mentioned above. Eyrie is situated on a small ledge - 2 x 3 or 3.5 feet & just 3 feet from very top of off 35-40 feet cliff. Next an old Raven nest apparently - a beat up with nest. The eggs actually are on bare sandy spot on ledge & only fragments of above nest remain on one edge of ledge. I took 2 pictures. Tom Cade removed one egg for albumen sample. It proved to be added. 7/8 of this pair very white underneath. Female dark. Pete Savalik collected youngs last year - so this is a new bird. Female sat on egg until we forced a rope one, the cliff when she burst out. The male swooped at her once - almost striking it seemed. Female very reluctant to return to nest. We left after a while from a point 300yds upstream from nest. She didn't reappear then. May 26. Tom Cade collected the last 3 eggs - all were added