An Aerial Census of Bald Eagles in Saskatchewan

Publisher Website
Google Scholar
Abstract
An aerial census was conducted to determine the numbers and productivity, and to delineate distribution of bald eagles (Haliaeetus leucocephalus) in a 270,000-km2 area of northern Saskatchewan [Canada]. Randomly located sample units were designed to contain uniform amounts of primary nesting habitat. An estimated 3900 breeding areas, 6900 adults, 4700 immatures and 2500 nestlings were present in the summer of 1974. In southwestern regions 0.95 young/breeding area were produced, indicating reproduction above the estimated minimum required for maintenance. There was a positive correlation between breeding area density and April mean temperature. Two models for eagle distribution in the province are discussed. As a monitoring tool, the census technique could detect a population change of 27%.

This publication has 2 references indexed in Scilit: