Great Basin Naturalist


Relationships of temperature and precipitation to the reproductive success of Blue Grouse (Dendragapus obscurus) were investigated. Maximum and minimum temperatures followed similar patterns during the years 1976–1981 and showed no patterns relative to hatching success. Precipitation data, however, was variable. When significant amounts of precipitation fell during the last three weeks of the hatching period, chick survival and, therefore, recruitment were adversely affected. We suggest that precipitation occurring at the end of the hatch period reduces the September harvest of birds.