Effects of weather on breeding ducks in North Dakota, by Merrill C. Hammond et al.

Title:	Effects of weather on breeding ducks in North Dakota
Author:	Hammond, Merrill C.
Author:	Johnson, Douglas H.
Author:	U.S. Fish and Wildlife Service
Note:	Washington, D.C. : U.S. Dept. of the Interior, Fish and Wildlife Service, 1984., 1984

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Subject:	Blue-winged teal
Subject:	Mallard
Subject:	Animal Physiology and Biochemistry
Subject:	Birds
Subject:	Birds -- Reproduction -- Climatic factors
Subject:	Birds -- Reproduction -- Climatic factors -- North Dakota
Subject:	Dierfysiologie en -biochemie
Subject:	Ducks -- Reproduction -- Climatic factors
Subject:	North Dakota
Subject:	Anatidae
Subject:	breeding season
Subject:	broedseizoen, vogels
Subject:	Climatic factors
Subject:	Ducks
Subject:	eenden
Subject:	periode van kuitschieten
Subject:	Reproduction
Subject:	Seasons
Subject:	seizoenen
Subject:	spawning season
Subject:	voortplanting
Subject:	Weather
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