Arnold 1937 Primitive Area, Strawberry Canyon, Berkeley, Alameda Co., Calif. Dec. 17 At 12:50 I am on the bridge at the east fence where the creek goes through. An adult Red-tailed Hawk just lit on a fence post just north of here at about the same place where I found the Rabbit's foot. It stood there preening for afew minutes and then flew outside of the area. I heard a Vigors Bewick's Wren in the brush around the bottom of the Bay Tree about 50 yards north. There is a Wren-tit behind me in the rushes. At 11:02 a Fox Sparrow and a Song Sparrow were seen 100 yards west of the east fence. I had my catch-alive mouse traps set at intervals of approx every thirty feet — starting at the west fence and parallelling the lower path. — As shown on the adjoining map. I was at sea as [illegible] to which system to use for marking closely related species. Dr Hall thinks it would be better to have no closely related species with duplicate numbers. This is not the way that I marked them at first but is the manner I