Abstract
We investigated specific adaptations in nest-site selection and nest building behaviour of female Water Pipits, which are thought to be key mechanisms explaining the high reproductive success of this species in the alpine tundra. Water Pipits were studied from 1983 to 1989 in Obergurgl (1935–2400 m), Otztal, Austria. Female Water Pipits spent 3–4 weeks for thorough scanning of potential nest cavities within territories. Nests were situated at sites which gave shelter from drifting snow or rain, from prevailing winds and from extreme radiation. All nests were deeply sunken into the ground and more resembled nest cavities, than simple ground-troughs. Additional adaptations were found in the technique of nest building.
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