00000nam 2200000zi 4500 9.892869 CaOODSP 20240527135432 m o d f cr bn||||||||| 201008s1979 abcab ob f000 0 eng d CaOODSP eng rda CaOODSP n-cn-nt x7x7 CW66-682/1979E-PDF Allen, D. Lynne, author. Raptors and colonial birds of the Yellowknife area and east arm of Great Slave Lake, N.W.T. / by D. Lynne Allen and David M. Ealey. Edmonton, Alberta : Canadian Wildlife Service, 1979. 1 online resource (v, 58 pages) : illustrations, maps text txt rdacontent computer c rdamedia online resource cr rdacarrier "July 1979." Digitized edition from print [produced by Environment and Climate Change Canada]. Some pages rotated in this copy. Includes bibliographical references (pages 52-56). "Surveys for nesting raptors and colonial waterbirds were conducted in the Yellowknife area and east arm of Great Slave Lake from June through September in 1978. Raptor nests found totalled 85 in the Yellowknife area and 136 in the east arm of Great Slave Lake. Most were Bald Eagle nests. The only colonial nesters sighted were larids of which the Herring Gull and Arctic Tern were most numerous. Of the 207 Bald Eagle nests recorded, 57% were on cliffs, 40% were in trees and the remainder were on the ground and utility poles. Over 90% were found within 100 m of water. We found 43 productive Bald Eagle nests and these nests contained an average of 1.6 eaglets. Eighty percent of the productive nests in the Yellowknife area were on islands. Bald Eagles initiated incubation in the second half of April and the young fledged during the first half of August. In the east arm of Great Slave Lake the raptors and colonial birds remain relatively undisturbed. However, outdoor recreational activity and chemical pollution from gold mines may be detrimentally affecting raptor populations in the Yellowknife area. This report includes recommendations to ameliorate the impact of development on the raptors and colonial birds of the study area"--Abstract. Issued also in print format. Birds of prey Northwest Territories Yellowknife Region. Birds of prey Northwest Territories Great Slave Lake. Laridae Northwest Territories Yellowknife Region. Laridae Northwest Territories Great Slave Lake. Bird surveys Northwest Territories Yellowknife Region. Bird surveys Northwest Territories Great Slave Lake. Rapaces Territoires du Nord-Ouest Yellowknife, Région de. Rapaces Territoires du Nord-Ouest Esclaves, Grand lac des. Laridés Territoires du Nord-Ouest Yellowknife, Région de. Laridés Territoires du Nord-Ouest Esclaves, Grand lac des. Oiseaux Inventaires Territoires du Nord-Ouest Yellowknife, Région de. Oiseaux Inventaires Territoires du Nord-Ouest Esclaves, Grand lac des. Canadian Wildlife Service, issuing body. PDF 12.86 MB https://publications.gc.ca/collections/collection_2020/eccc/cw66/CW66-682-1979-eng.pdf