Population trends of black ducks and mallards from the North American Breeding Bird Survey: Are increases in mallards associated with declines in black ducks?
January 1, 1997
No abstract available.
Citation Information
Publication Year | 1997 |
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Title | Population trends of black ducks and mallards from the North American Breeding Bird Survey: Are increases in mallards associated with declines in black ducks? |
Authors | J.R. Sauer, Sam Droege |
Publication Type | Book Chapter |
Publication Subtype | Book Chapter |
Index ID | 5211120 |
Record Source | USGS Publications Warehouse |
USGS Organization | Patuxent Wildlife Research Center |