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An explosive growth in the sport of rock-climbing has brought previously isolated, cliff-dwelling species into close contact with humans. Skaha Bluffs in the South Okanagan Valley, B.C. is now a major rock-climbing destination and home to at least 13 Red- and Blue-listed species. Of these, by far the most visible is the white-throated swift (Aeronautes saxitalis). Peak use of this area by both swifts and climbers is April to September. Most of the swifts’ nests are on cliffs little used by climbers, who also prefer to climb on open faces rather than the cracks frequented by swifts. There was no detectable difference in the proportion of successful nests on cliffs used by climbers compared to unused cliffs. Nor was there any decrease over the course of the study in the total number of nesting swifts in Skaha Bluffs, or a move from cliffs popular with climbers to unvisited ones. Canyon wrens (Catherpes mexicana) seem equally unaffected by the surrounding clamour...
Richardson, Howard. 1999. Threats Posed by Rock-Climbers to Birds Nesting on Cliffs in the South Okanagan (in Proc. Conference Biology & Management of Species and Habitats at Risk). Ministry of Environment, Lands and Parks; University College of the Cariboo. Conference Biology & ManagementProceedings
Other Identifier: University College of the Cariboo
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