Publications

No abstract available.

Careful sampling design is required to obtain useful estimates of raptor abundance. Well-defined objectives, selection of appropriate sample units and sampling scheme, and attention to detail to reduce extraneous sources of variability and error are all important considerations in designing a raptor survey.

No abstract available.

Determining the status of all habitats in the nine western states considered in this symposium is a difficult task. The authors of habitat status papers commented that the diversity of habitat classification systems limited their ability to relate habitat status to raptors. Differences of scale, objectives and survey design have hindered integration of habitat classification methods used by land

Summary of availability, habitat use, and management of waterfowl habitat during migration and winter in northern Atlantic states.

No abstract available.

This paper deals with the effects of contaminants, including selenium, in agricultural drainwater on reproduction of aquatic birds in the Grasslands area of western Merced County, California

Concentrations of selenium, mercury, and cadmium were measured in surf scoters in San Francisco Bay to assess possible effects of contaminants on health or reproduction of diving ducks.

The shiny cowbird (Molthrus bonariensis), an avian brood parasite, is endemic to South America, Trinidad, and Tobago, but during the last 100 years the species has spread through the West Indies. Successful colonization by the shiny cowbird depends on the availablitiy of suitable habitats and host species. As forest fragmentation increases in the West Indies, new hosts, particularly forest speci

We describe waterfowl populations and habitats in the Northern Great Plains; relate habitats and habitat managemnet pratices to annual cycle requirements of migrating and wintering ducks and geese; and suggest management approaches for wintering and migrating waterfowl.

The principal means of monitoring avian species in North America since 1966 is the Breeding Bird Survey (BBS). Nearly 2000 random roadside rouleS of 50 3-minule stops each are run once each summer by experienced observers. Two-year and 10ng-lerm population trends have been calculated for 250 of the more common species. We show how Breeding Bird Atlas dala for lWO periods of time can also be used t

Available data are summarized according to the following major topics: (1) characteristics of the Mississippi Alluvial Valley (MAV); (2) waterfowl populations associated with the MAV; (3) habitat requirements of migrating and wintering waterfowl in the MAV; (4) current habitat management practices in the MAV, including croplands, moist-soil impoundments, and forested wetlands; (5) status and clas