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Ruddy Duck nesting success: do nest characteristics deter nest predation?

Article Abstract:

Nesting success in Ruddy Ducks is unpredictable based on a range of nest-site characteristics, according to research into 233 Ruddy Duck nests during summers 1994 to 1996 in the aspen parkland physiographic zone of the prairie pothole region near Minnedosa, Manitoba, Canada. It is possible that females in good physical condition are more likely to nest successfully than females in poor body condition. Furthermore, nest-site cover may affect thermal conditions in and around the nest. A high diversity of nest predators could prevent placement of nests in secure sites.

Behavior, Ruddy duck

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Relative effects of plumage coloration and vegetation density on nest success

Article Abstract:

Plumage dichromatism is believed to arise through sexual selection. The Northern Cardinal is a highly dichromatic passerine and incubation is usually undertaken by the female. Artificial nests and simulated male and female cardinals were used to test whether incubation by males reduced nest success. The results indicated that male cardinals are not constrained to avoid incubation, although there were limitations to the study with regard to movement and plumage color.

Research, Color

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