Population ecology of the long-billed curlew (Numenius americanus) in western Idaho

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In western Idaho, a breeding population of Long-billed Curlews (Numenius americanus) remained relatively stable over a 7-yr period. Productivity was monitored closely from 1977 through 1979. Clutch mortality rates did not differ significantly among years, and mean clutch survival for a 32-day nesting period (4 days egg laying and 28 days incubation) was 40% for all 3 yr combined. Females laid just one clutch (usually of 4 eggs) each season, and mean clutch size was significantly smaller in 1979 than in 1977 and 1978. Estimated fledging success ranged from 0.40 in 1977 to 0.17 in 1978 and was consistently greater for females that nested early each season. Mean annual adult survival was estimated at 85% based on resightings of color-marked individuals. Limited data for subadult survival precluded complete demographic analysis. Nevertheless, given the estimates of productivity and adult survival pooled for 3 yr, survival of subadults from fledging until first breeding as 3-year-olds needed to be only 58% to maintain the stable population size observed through 1983.

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Reference Code: A86RED01IDUS

Full Citation: Redmond, R. L., and D. A. Jenni. 1986. Population ecology of the long-billed curlew (Numenius americanus) in western Idaho. Auk 103(4): 755-767.

Location: ANIMAL EF: NUMENIUS AMERICANUS