Open Daily: 10am - 10pm | Alley door pickup 10am - 7pm 3038 Hennepin Ave Minneapolis, MN
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  • Open Daily: 10am - 10pm
    Alley-side Pickup: 10am - 7pm

    3038 Hennepin Ave Minneapolis, MN
    612-822-4611

Open Daily: 10am - 10pm | Alley-side Pickup: 10am - 7pm
3038 Hennepin Ave Minneapolis, MN
612-822-4611
The North American Whistling-Ducks, Pochards, and Stifftails

The North American Whistling-Ducks, Pochards, and Stifftails

Johnsgard, Paul

Paperback

General Science

ISBN10: 1609621107
ISBN13: 9781609621100
Publisher: Lightning Source Inc
Published: Mar 24 2017
Pages: 184
Weight: 0.97
Height: 0.39 Width: 8.50 Depth: 11.00
Language: English
The 12 species described in this volume are not closely related, but they provide an instructive example of adaptive evolutionary radiation within the much larger waterfowl lineage as to their divergent morphologies, life histories, and social behaviors. The whistling-ducks (Dendrocygna), with three known North American species, are notable for their permanent pair-bonds, extended biparental family care, and strong social cohesion. In contrast, males of the five typical pochards (Aythya) maintain monogamous pair-bonds only long enough to assure that the female's eggs are fertilized. The extreme of this behavior exists among the stifftails (Oxyura). Such diverse reproductive strategies have exerted powerful evolutionary influences on interspecies variations in sexual dimorphism, sexual behavior, anatomy, ecology, and other traits. This volume includes more than 63,000 words, plus some 200 maps, photos, drawings, and sketches, and nearly 650 literature citations.

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