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1 January 2004 Nest-site characteristics of Northern Waterthrushes
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We describe the nest-site characteristics of Northern Waterthrushes (Seiurus noveboracensis) in western Newfoundland. Based on data for 36 nests (20 in streambanks, 16 in overturned trees) and 108 comparative sites, we examined habitat features at microhabitat (a 25-cm radius around the nest) and macrohabitat (a 5-m radius, and position on the landscape) scales. Assessment of microhabitat variables indicated that features around nests in the roots of overturned trees were no different from randomly selected sites. However, streambank nest-site features at this spatial scale distinguished these nest sites from randomly selected streambank locations through the presence of greater substrate slope and less leafy vegetation around nests. At broader spatial scales, streambank nests did not differ from associated random sites, but the macrohabitat features of nests in overturned trees distinguished them from randomly selected overturned-tree sites through overturned-tree nests being closer to water and having higher numbers of small-size-class deciduous trees in the surrounding habitat. Overall, depredated nests had less concealment with lower numbers of coniferous trees within 5 m, particularly in smaller size classes. Nests in buffer strips had greater numbers of both deciduous and coniferous trees in these smaller size classes than did nests in riparian habitat adjacent to undisturbed forests.

Ian G. Warkentin, Shawn E. Roberts, Stephen P. Flemming, and Allison L. Fisher "Nest-site characteristics of Northern Waterthrushes," Journal of Field Ornithology 75(1), 79-88, (1 January 2004).
Received: 30 September 2002; Accepted: 1 March 2003; Published: 1 January 2004

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