The green-winged teal
Subtitle: its distribution, migration, and population dynamics
By: by Gaston Moisan, and Robert I. Smith, and R. Kahler Martinson
Series: Special scientific report--wildlife -- no. 100
Publisher: U.S. Dept. of the Interior, Fish and Wildlife Service, Bureau of Sport Fisheries and Wildlife; For sale by the Supt. of Docs., U.S. G.P.O.
Published: 1967
Place of publication: Washington, D.C
Language: eng
Number of pages: 248
Subjects: Ducks; Statistics; Duck shooting
Other titles: Green winged teal: its distribution, migration, and population dynamics.
Description: The green-winged teal is the smallest of our ducks. It is widely distributed, nesting from Alaska to Newfoundland and from the norther tree limit to central California and Maine, and wintering from British Columbia and Newfoundland south to Venezuela. As interest in waterfowl increases and the supply becomes less certain, the idea of regulating harvest by species has increased. It becomes increasingly important therefore, to learn and describe the population characteristics of each of the game species. Because of the currently low population levels of important waterfowl species such as the mallard, black duck, canvasback and redhead, regulations governing the hunting of these choice species have been restrictive. Thus species like the green-winged teal become more important as sources of additional hunting opportunity, but despite its wide distribution and rank among the 20-odd species in the harvest, information is lacking about its status. The present work reports a study of the distribution, migration, hunting kill, survival, and status of the green-winged teal in the New World.
Notes: "April 1967."

Bibliography: p. 46-49.
Table of contents: title: Introduction.; title: Procedures.; title: Taxonomy and Distribution.; title: Migrations and distributions of hunting kill from reference areas.; title: Hunting kill of green-winged teal.; title: Derivation of harvest.; title: Rate of hunting kill.; title: Mortality rates.; title: Age ratios and production rates.; title: Sex ratios.; title: Estimates of population size.; title: Summary and conclusions.; title: References.; title: Appendix.