TABLE B-6. Southern Manitoba--1977 waterfowl breeding ground survey results. = 
= : 

RFOWL BREEDING SURVE WATERF'! RODUCTION SURVE 
* (NUMBERS IN THOUSANDS ) (NUMBERS IN THOUSANDS) 
1977. % CHANGE 1967-1976 % CHANGE 1977 % CHANGE 1967-1976  % CHANGE 
FROM 1976 AVERAGE FROM AVERAGE FROM 1976 AVERAGE FROM AVERAGE 
: -45 702.2 -37 JULY PONDS 331.6  -15 317.4 +4 
wee = ‘ DUCK BROOD INDEX 25.8 -16 24.2 +7 
AVG. BROOD SIZE 5.639 +10 5. 360 +5 
BREEDING POPULATION ESTIMATES LATE-NESTING INDEXES 
DUCKS: 
ABBLERS: 
, mtgere 252.7 -53 352.9 -28 13.2 +181 2 +18 
BLACK DUCK 0.0 n.c. 3 -100 5 ad Z 
GADWALL 60.1 -18 76.4 -21 : -60 i = 
AMERICAN WIGEON 17.3 -49 51.9 -67 : se a a 
GREEN-WINGED TEAL 5.3 -68 109.9 -68 — = as Rs 
BLUE-WINGED TEAL 292.9 -55 556.1 -47 6.2 “1.98 ; = 
NORTHERN SHOVELER 39.0 -75 102.4 -62 0.0 - ee 10 
PINTAIL 26.1 -90 185.8 -86 4 = -69 - 
SUBTOTAL 723.4 -60 1,435.7 -50 21.5 +150 rae n.c. 
DIVERS: 
REDHEAD. 93.2 +12 83.8 +1] 0.0 he: y 18 
CANVASBACK 54.1 -51 65.8 -18 1 = ze + 
SCAUP 129.7 -38 115.3 +12 5 “ ¢ P 
RING-NECKED 10.4 -45 10.4 n.c. 0.0 1 : = 
AMERICAN GOLDENEYE 4.9 -86 18.2 -73 0.0 - > — 
BUFFLEHEAD 17.8 -21 16.4 +8 0.0 ne sa 7 
SUBTOTAL. 310.1 -35 309.9 n.c. & -5 ‘ 
MISCELLANEOUS: 
OLDSQUAW 0.0 n.c. 0.0 nic. 0.0 n.c. ae ae 
EIDER 0.0 n.c. 0.0 n.c. 0.0 #<c. oo oa 
SCOTER Ef -71 9 -22 6.6. wee. ua es 
RUDDY DUCK 67.7 -24 105.6 ~36 1.5. -70 os : 
MERGANSER 5.6 +87 3.4 +65 0.0 on.c. ee noes 
SUBTOTAL 74.0 -21 109.9 -33 1.5 -70 , 
TOTAL DUCKS 1,107.5 -54 1,855.5 -40 23.6 +56 29.7 -20 
COOTS 
AMERICAN COOT 180.1 -62 287.9 -37 
GRAND TOTAL 1,287.6 -55 2,143.4 -40 23.6 +56 29.7 -20 


TABLE B-7. Montana--1977 waterfowl] breeding ground survey results. 
WATERFOWL BREEDING PAIR SURVEY WATERFOWL PRODUCTION SURVEY 
(NUMBERS IN THOUSANDS) (NUMBERS IN THOUSANDS) 
1977. % CHANGE 1967-1976 % CHANGE 1977. % CHANGE 1966-19762/ % CHANGE 
FROM 1976 AVERAGE FROM AVERAGE FROM 1976 AVERAGE FROM AVERAGE 
MAY PONDS 192.6 -19 244.3 -21 JULY PONDS 131.8 -4] 177.8 -26 
DUCK BROOD INDEX 24.0 -47 49.9 -52 
AVG. BROOD SIZE 4.699 -13 5.203 -10 
BREEDING POPULATION ESTIMATES LATE-NESTING INDEXES 
DUCKS: 
DABBLERS: 
MALLARD 332.6 -31 395.8 -16 1.5 -82 8.2 -82 
BLACK DUCK 0.0 Ref. 0.0 fisG> 0.0 n.c. 0.0 i 
GADWALL . 103.6 +87 76.0 +36 1.8 -44 1.5 +20 
AMERICAN WIGEON 77.0 -23 180.0 -57 a -35 3.9 -72 
GREEN-WINGED TEAL 11.2 -71 77.2 -85 0.6 a,£, 4 -100 
BLUE-WINGED TEAL 93.8 -55 147.2 -36 0.0 -100 1.3 -100 
NORTHERN. SHOVELER 55.6 -46 82.1 -32 0.0 -100 oF -100 
PINTAIL 118.5 ~48 239.8 -50 4 -86 2.0 -80 
SUBTOTAL 792.3 -34 1,198.1 -34 4.8 -73 18.0 -73 
DIVERS: 
REDHEAD 8.7 +18 9.) -4 0.0 -100 mY | -100 
CANVASBACK 3.8 -80 6.7 -43 0.0 -100 4 -100 
SCAUP 27.3 -30 48.0 -43 3 -62 1.0 -70 
RING-NECKED J -82 1.6 -81 4 in +300 
AMERICAN GOLDENEYE e 3 -46 0.0 n.c. | -100 
BUFFLEHEAD 0.0 -100 9 -100 Go. a... 0.0 n.c. 
SUBTOTAL 40.8 -40 67.6 -40 7 -50 | A -59 
MISCELLANEOUS: 
OLDSQUAW 0.0 n.c 0.0 n.c. OG " Wc. 0.0 nse: 
EIDER 0.0 n.c 0.0 n.c. GO “AG. 0.0 mC. 
SCOTER 0.0 n.c. 0.0 n.c. 0. wc. 0.0 ine 
RUDDY DUCK 4.1 -39 15.1 -73 0.0 -100 4 -100 
MERGANSER 1.7 +240 1.0 +70 0.0 n.c. | -100 
SUBTOTAL 5.8 -19 16.1 -64 0.0 -100 5 -100 
TOTAL DUCKS 838.9 -35 1,281.8 -34 5.5 -72 20.2 -73 
COOoTS 
AMERICAN COOT 18.8 -72 33.9 -44 
GRAND TOTAL 857.7 -37 1,315.7 -35 
4/1971 not flown 
G3 
