00000nam 2200000za 4500 9.849882 CaOODSP 20241203113641 cr ||||||||||| 180111s1982 oncb||||o f000 0 eng d CaOODSP eng n-cn-on n-us--- CW69-9/133E-PDF Blokpoel, H., 1938- Immigration and recruitment of ring-billed gulls and common terns on the lower Great Lakes [electronic resource] / by H. Blokpoel and P.A. Courtney. [Ottawa] : Canadian Wildlife Service, 1982. 12 p. : maps Progress notes ; no. 133 "November 1982." Digitized edition from print [produced by Environment and Climate Change Canada]. Issued also in French under title: Immigration et recrutement du Goéland à bec cerclé et de la Sterne commune dans les Grands lacs d'aval. Includes bibliographical references. "The rates at which Ring-billed Gulls (Larus delawarensis) and Common Terns (Sterna hirundo) moved from their natal colonies to colonies at the Eastern Headland (Lake Ontario) and Port Colborne (Lake Erie) were examined"--Abstract. gccst Birds gccst Population Ring-billed gulls Common terns Courtney, P. A. Canada. Environment Canada. Canadian Wildlife Service. Immigration et recrutement du Goéland à bec cerclé et de la Sterne commune dans les Grands lacs d’aval (CaOODSP)9.860512 Progress notes (Canadian Wildlife Service) no. 133 (CaOODSP)9.504439 PDF 649 KB https://publications.gc.ca/collections/collection_2018/eccc/CW69-9-133-eng.pdf