The status of trumpeter swans in British Columbia and Yukon, summer, 1990 / R. McKelvey, J. Hawkings. : CW69-5/115E-PDF
"A survey of breeding Trumpeter Swans (Cygnus c. buccinators) was conducted in British Columbia and the Yukon in 1990. Survey routes were similar to those used in the 1985 survey, with the addition of one new route in the Beaver Creek area of the Yukon. A total of 322 adult (white) swans and 125 cygnets was seen. That represents an increase of 87.8% since 1985. Productivity in 1990 was 28.0%. Habitat conditions were good to excellent. Survival appears to be good in spite of the difficulties reported on wintering areas in the Wyoming-Montana-Idaho area of the United States"--Abstract.
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| Ministère/Organisme | Canada. Environment Canada. Canadian Wildlife Service. Pacific and Yukon Region. |
|---|---|
| Titre | The status of trumpeter swans in British Columbia and Yukon, summer, 1990 / R. McKelvey, J. Hawkings. |
| Titre de la série | Technical report series ; no. 115 |
| Type de publication | Série - Voir l'enregistrement principal |
| Langue | [Anglais] |
| Format | Électronique |
| Document électronique | |
| Note(s) | Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references (p. 11). Issued also in print format. Includes abstract in French. |
| Information sur la publication | Delta, B.C. : Canadian Wildlife Service, Pacific and Yukon Region, 1990. |
| Auteur / Contributeur | McKelvey, Richard W. Hawkings, J. |
| Description | iii, 27 p. : col. maps. |
| Numéro de catalogue |
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| Descripteurs | Trumpeter swan Bird surveys British Columbia Yukon |
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