Wilson's Phalarope nest success is not influenced by vegetation concealment

Article Abstract:

A study was conducted to examine the co-relation between nesting success of Wilson's Phalaropes (Phalaropus tricolor) and concealment of the nests from predators. Vegetation characteristics around nests were studied in Saskatchewan, from 1983 to 1984. Results showed that thick vegetation cover may conceal nest-sites from avian predators but it was inadequate against ground predators such as squirrels and minks. Concealment from avian predators was not the determining factor in nest site selection, weather and temperature conditions also influenced habitat selection.

Protection and preservation, Predation (Biology), Ornithological research, Saskatchewan

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Shorebird community patterns in a seasonally dynamic estuary

Article Abstract:

The environmental factors that influence nonbreeding shorebird communities inhabiting a stretch of the Mad River in California were investigated. The Detrended Correspondence Analysis was used to analyze the seasonal variation in the shorebird community composition. The seasonal variation in other invertebrate communities was also studied using the same technique. Results revealed that the shorebirds exhibit significant variation in community patterns. This variation was attributed to the birds' exposed intertidal habitat.

Animal behavior

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Nonrandom shorebird distribution and fine-scale variation in prey abundance

Article Abstract:

The fine-scale variation in the spatial distribution and foraging ecology of a group of nonbreeding shorebirds was studied. Patterns of spatial distribution of several shorebird species were determined analytically from observations conducted in Humboldt County, California between Jul 27 and Sep 241991. Results showed that the shorebirds exhibit nonrandom spatial distribution. The species were also found to be highly clumped in the study area.

Spatial behavior in animals, Animal spatial behavior

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