The ring-billed gull in Ontario : a review of a new problem species / H. Blokpoel, G.D. Tessier.: CW69-1/57E-PDF
"During the period 1976-84 the nesting population of the Ring-billed Gull (Larus delawarensis) in the Great Lakes and Upper St. Lawrence River increased at an average annual growth rate of 11%. In 1984 there were an estimated 700 000 pairs of Ring-bills in that area (about two-thirds in Canada and one-third in the USA). Because Ring-bills are highly adaptable it is likely that their numbers will continue to increase"--Abstract.
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| Department/Agency | Canada. Environment Canada. Canadian Wildlife Service. |
|---|---|
| Title | The ring-billed gull in Ontario : a review of a new problem species / H. Blokpoel, G.D. Tessier. |
| Series title | Occasional paper ; no. 57 |
| Publication type | Series - View Master Record |
| Language | [English] |
| Other language editions | [French] |
| Format | Electronic |
| Electronic document | |
| Note(s) | Digitized edition from print [produced by Environment and Climate Change Canada]. Issued also in French under title: Le goéland à bec cerclé en Ontario : une nouvelle espèce problème. Errata sheet inside front cover. Includes bibliographical references. |
| Publishing information | [Ottawa] : Canadian Wildlife Service, 1986. |
| Author / Contributor | Blokpoel, H., 1938- Tessier, G. D. |
| Description | 34 p. : ill. |
| Catalogue number |
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| Subject terms | Birds Population Environmental impact Ring-billed gull |
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