Field Notes Doug Bell April 2, 1989 falcon flew right back to the pothole, swallowed the item, then walked over to her eggs + settled. From our vantage on Pine Ridge we could see the cancerous growth of Concord + Walnut Creek to the north, new houses being built on a ridge to the west (from Danville), and a few horses to the south from Diablo & Blackhawk. It is unbelievable that prairie Falcons are nesting in Pine Canyon. In addition, the Park Superintendent, Mr. Felix Arteaga, & Gerry Beeman, said Prairies are on Blackhawk too.