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Aquatic Vascular Plants In Three Bays Of Eastern Door County, Wisconsin, Peter J. Salamun

Field Station Bulletins

Aquatic macrophytes of the western shores of Lake Michigan have received little attention from Wisconsin botanists (Ross and Calhoun, 1951; Curtis, 1959), probably because few localities are available for study. Severe wave action and unstable bottom sediments prevent the establishment of such plants in many areas of the lakeshore and intensive shoreline development has eliminated most of the hardy species which were originally present. However, three bays in eastern Door County (Rowleys Bay, North Bay and Moonlight Bay) support a considerable number of aquatic plant because they are protected from severe storms and are relatively free from human interference. This …

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Predator Recognition Through Audition In The Black-Capped Chickadee (Parus Airicapillus), Karen Apel

Field Station Bulletins

The behavior of bird species toward a potential predator has been investigated in various studies in which a live or model predator has been presented to the subject(s). However, with the exception of a few reports of the responses of birds to imitated calls of different birds of prey (e.g., Miller, 1952), little work has been done on how a bird's behavior is influenced by the vocalizations of predators. The purpose of this study was to record the behavior of free-living Black-capped Chickadees (Parus atricapillus) when tape-recorded calls of predatory birds were played back to them.

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