Remsen, J.V. 1974 Prairie Falcon Falco mexicanus Feb.16 Hwy 33, w.of I-5, Fresno Co, Calif.: 1 Hwy 33, Kings Co, Calif.: 1 Feb.17 Elkhorn Plain, San Luis Obispo Co, Calif: 2 - apparently a female chasing an apparent male, one bird, the pursuer, was larger and slightly darker than the other. One of the birds was calling. May 26 Furnace Creek Ranch, Inyo Co., Calif.: 2 Dec.17 Butte Sink, Sutter Co., Calif: 2 Dec.28 Barr Lake to Muir Spgs, Colo: 6. From a post distance sitting on a post, this species appears so white that all three of us called various individuals Ferruginous Hawks until we got glasses on the bird. [illegible]