MID-WINTER SURVEY INFO: (Division of Migratory Bird Management, US Fish and Wildlife Service, unpublished data.)
TUFFY NOTE:
Quantity values
from the Mid-Winter Surveys should be clarified in their limitations. These numbers should be recognized as only an
“Index” and are NOT purported to be the “number of ducks wintering in each
state”. Looking at a state from year to
year can be useful, but comparing the absolute values of different states may
not be as valid. Different states devote
different degrees of effort and, while each is reasonably consistent from year
to year, comparisons among states are to be discouraged beyond recognition of
those that are “gaining” and those that are “declining” for a given
period. The reader is also cautioned to
note the year-to-year changes in the total MWI.
Planned charts showing the “share” of the MWI in each state may be more
useful for some purposes.
DATA TABLES
Black BW/Cinn_Teal Canvasback Gadwall GW_Teal
Mallard Pintail Redhead Ringneck Scaup
ANNUAL MAPS
2015 Species MWI:
Atlantic Flyway Mississippi Flyway Central Flyway Pacific Flyway
State MWI (1955-2015):
Delaware Florida Georgia Maryland Massachusetts
New_Jersey New York North Carolina Pennsylvania South Carolina
Species MWI (1955-2015):
Atlantic Flyway Mississippi Flyway Central Flyway Pacific Flyway
Mallard MWI (1955-2015):
Atlantic Flyway Mississippi Flyway Central Flyway Pacific Flyway