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November 2008 | Publisher: USGS | Science Center: Western Ecological Research Center (WERC, Sacramento) | Format: URL
www.werc.usgs.gov — Species distribution models are widely used, at multiple scales, to predict the geographical distribution of habitat suitability or species occurrence. Several studies have found that more accurate predictive models of species occurrences can be developed for rarer species. One recent study, however, found the relationship between range size and More...
2008 | Publisher: Other Federal Agency (United States Fish and Wildlife Service (USFWS)) | Format: .PDF
www.fws.gov — This report is the result of a cooperative effort between the National Oceanic and Atmospheric Administration's (NOAA) and the U.S. Fish and Wildlife Service (FWS). The efforts to monitor coastal wetland status and trends described in this report have been enhanced by the multi-agency involvement in the study's design, data collection, More...
2007 | Publisher: USGS | Format: .PDF
pubs.usgs.gov — Ospreys are large fish-eating birds of prey that live along seacoasts, lakes, and rivers. Three times since 1977, USGS zoologist Chuck Henny has led an international team to survey ospreys and other water birds that nest in northwestern Mexico. This USGS report details the long-term dataset and estimates on regional population trends.
2005 | Publisher: USGS | Format: URL
biology.usgs.gov — Laysan ducks are among the last native waterfowl species of Hawaii. Conservation strategies based solely on protecting Laysan Island are risky as natural events such as hurricanes and droughts may eliminate the species. In this fact sheet, learn why and how USGS and USFWS translocated endangered Laysan ducks (Anas laysanensis) from Laysan Island More...
Publisher: USGS | Science Center: Fort Collins Science Center (FORT, Ft. Collins) | Format: URL
www.fort.usgs.gov — This web publication gives an overview of the threats and strategies recommended management strategies for grassland birds. Grassland ecosystems are dependent on periodic disturbance for habitat maintenance. Historically, grazing by native herbivores and prairie fires were the agents principally responsible for maintaining grassland areas. More...
Publisher: Other Federal Agency (United States Fish and Wildlife Service (USFWS)) | Format: .PDF
www.fws.gov — The American woodcock is a popular game bird throughout eastern North America. The management objective of the U. S. Fish and Wildlife Service (FWS) is to increase populations of woodcock to levels consistent with the demands of consumptive and nonconsumptive users (U. S. Fish and Wildlife Service 1990). Reliable annual population estimates, More...
Publisher: Other (Auk, The) | Format: .PDF
www.fort.usgs.gov — This publication is a report on the Population-Specific Demographic Estimates and how they might Provide Insights Into Declines of Lark Buntings (Calamospiza Melanocorys). Many North American prairie bird populations have recently declined, and the causes of these declines remain largely unknown. To determine whether population limitation occurs More...
Publisher: USGS | Science Center: National Wetlands Research Center (NWRC, Lafayette) | Format: URL
www.nwrc.usgs.gov — This report is a comprehensive summary of the status and trends of our nation's biological resources. The report describes the major processes and factors affecting biological resources, and it treats regional status and trends. Authors of the chapters and boxes in this two-volume report were drawn from federal and state agencies, universities, More...
Publisher: USGS | Science Center: Pacific Island Ecosystems Research Center (PIERC, Honolulu) | Format: URL
biology.usgs.gov — Preliminary field data of 1998 and 1999 about the ecology of the endangered Laysan duck (Anas laysanensis). The data about foraging habits, habitat characteristics, and population status was gathered to support translocation recovery efforts in Hawaii.
U.S. Department of the Interior |
U.S. Geological Survey