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Ducks -- North America.

View Resource Trends in Duck Breeding Populations, 1955-2001

The US Fish and Wildlife Service's Office of Migratory Birds Management has posted online this recent report, by K. Wilkins and others, on "preliminary information about the status of duck populations and their habitats during spring 1999." The entire report, including text, graphics, and tables, may be downloaded (.pdf format) at the site.
View Resource Effects of Water Conditions on Clutch Size, Egg Volume, and Hatchling Mass of Mallards and Gadwalls in the Prairie Pothole Region

This publication has recently been placed online at the Northern Prairie Wildlife Research Center (NPWRC) Website. Pamela J. Pietz and colleagues examine the relationship between local water conditions and reproductive variables for North Dakota and Minnesota ducks, 1988-1994; the study was first published in 2000 in Condor [102:936-940]. The publication may be downloaded as a .zip file or browsed...