Plant and animal species have been used for decades as indicators of air and water quality
and agricultural and range conditions. Increasingly, vertebrates are used to assess …

We studied the factors that led to brood reduction in 1192 nest/years of 143 territories of the
Spanish imperial eagle during the period 1988–2003 and we carried out an innovative …

The analysis of 267 records of non-natural mortality of the Spanish imperial eagle Aquila
adalberti over a 16-year period (1989-2004) shows an annual rate of 15.1 individuals found …

Page 1 \ . Jon M. Gerrard and Gary R. Bortolotti '' - -- |- | - * | \\ # , , ; | - - ' ' - 'N' A \ - - . MA. Page 2
(Gary R. Bortolotti) (Photo Credit col.1) Page 3 A Smithsonian Nature Book THE BALDEACLE …

There is a long history of managing endangered birds. Techniques were first developed for
game bird management and later adapted from falconry and aviculture to a wide range of …

From 1989 to 1996, I studied the Harpy Eagle (Harpia harpyja) in two regions at similar
latitude in Central and South America to learn more about the biology and habitat of this …

Background information is provided on the status and ecology of raptors (birds of prey) in
Britain and the legislation that gives them full protection. Based on this information …

From 1983 to 1996, during road travel and field work, all raptors observed were recorded.
Observations took place in regions of extensive sheep, cattle and goat production in steppe …

A two-part questionnaire was distributed to the electric utility industry to document the
utilization of electric utility facilities for nesting by raptors. The survey was designed to solicit …

Abstract Information on the habitat requirements and effects of habitat management on
grassland birds were summarized from information in more than 4,000 published and …