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Nest-site selection and nest predation in the purple swamphen

机译:紫色沼泽中的巢穴选择和巢捕食

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摘要

Nest-site selection in the Purple Swamphen (Porphyrio porphyrio) was quantified as a function of availability of food sources and predation risk. Purple Swamphens build several nests within their territories, one of which is selected for egg-laving. Nesting sites were mostly located near open areas (less concealed patches compared to non-nesting sites), where the main food source (cattail, Typha domingensis) grows earlier and better than in More covered areas. When selecting a nest for egg-laying, however, birds chose the most Concealed of all nests built.
机译:根据食物来源的可用性和被捕食的风险,对紫色沼泽(Porphyrio porphyrio)的巢地选择进行了量化。紫色Swamphens在其领土内建有多个巢穴,其中之一被选为熏蛋的巢穴。筑巢地点大多位于空旷地区(与非筑巢地点相比,隐蔽斑块较少),那里的主要食物来源(香蒲,香蒲)生长得更快,且覆盖率更高。但是,在选择要产卵的巢时,鸟类会选择所有隐窝中最隐蔽的巢。

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