Crow-Waterfowl Relationships: Based on Preliminary Studies on Canadian Breeding Grounds (Classic Reprint) - Couverture souple

E. R. Kalmbach

9780331019506: Crow-Waterfowl Relationships: Based on Preliminary Studies on Canadian Breeding Grounds (Classic Reprint)

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ISBN 10 : 0331019507 ISBN 13 : 9780331019506

Editeur : Forgotten Books, 2018

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�diteur: Forgotten Books
Date d'�dition: 2018
Langue: anglais
ISBN 10: 0331019507
ISBN 13: 9780331019506
Reliure: Broch�
Nombre de pages: 48
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Crow-Waterfowl Relationships (Classic Reprint)

E. R. Kalmbach

Edit� par Forgotten Books, 2018

ISBN 10 : 0331019507 ISBN 13 : 9780331019506

Neuf Paperback

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Vendeur : Forgotten Books, London, Royaume-Uni

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Paperback. Etat : New. Print on Demand. This book delves into the relationship between crows and waterfowl during nesting seasons. The author spent the summers of 1934 and 1935 observing these species in their natural habitat, with a specific focus on duck nests near Waterhen Lake, Saskatchewan. Of the 512 nests observed over the two summers, only 250 successfully hatched, with crows being responsible for destroying 156 of the nests. Various other animals and environmental factors contributed to the destruction of most of the other nests. Crows typically steal eggs during the egg-laying or incubation period, and the author also observed that hatching success increased noticeably towards the end of the nesting season, when crows were less likely to target duck eggs. The author's observations suggest that the impact of crows on waterfowl populations may be influenced not only by the abundance of crows but also by their feeding habits and the timing of the nesting season, providing valuable insights into the complex dynamics of predator-prey relationships in the wild. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item. N� de r�f. du vendeur 9780331019506_0

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