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Measurements (linear in mm, mass in g) of Northern Pintails during various seasons in North America. Data shown as mean ± SD (range; n).

SeasonFall                                                     Fall–winter                                          Spring                                                Prelaying                            Laying                   Molt                                      
Body Mass (g)
Adults
Males991.59 ± 121.47 (660-1380; 348)11052.74 ± 111.78 (662-1360; 1396)4956.14 ± 74.74 (869-1046; 7)15906 ± 87 (–; 21)21848 ± 74 (–; 7)23853 ± 14 (–; 116)25
1079.18 ± 107.14 (872-1334; 39)51032.15 ± 119.57 (795-1268; 22)16948.6 (–; 8)22821.7 (–; 9)24905 ± 95 (715–1100; 17)26
964 ± 129 (–; 140)61115 ± 110  (–; 25)17
1042.3 ± 140.75 (–; 237)71025.6 (–; 9)18
853 ± 105.2 (–; 18)81000 ± 22.4 (920-1060; 5)19
935.5 ± 91.1 (594-1182; 216)9
Females788.22 ± 85.96 (550-1100; 841)2895.21 ± 94.54 (585-1250; 451)4772.5 ± 14.85 (762-783; 2)15772 ± 70 (–; 19)21755 ± 69 (–; 12)23729 ± 40 (–; 7)26
815.22 ± 89.96 (610-1120; 198)1821.97 ± 73.96 (600-1020; 185)10934.75 ± 122.33 (713-1173; 14)16786.1 (–; 10)22709.4 (–; 9)24
765 ± 90 (–; 234)3919.1 ± 90.17 (764-1120; 48)5984 ± 85 (–; 22)17
835 ± 105 (–; 69)6821.0 (–; 9)18
779.8 ± 124.9 (–; 88)11900 ± 22.4 (840-1000; 5)19
896.0 ± 106.2 (–; 60)7866.2 ± 70.5 (–; 58)20
763.6 ± 94.6 (–; 18)8
831.0 ± 87.4 (640-1070; 72)9                                                                   
Hatch–year
Males855.05 ± 113.09 (600-1190; 201)11008.6 ± 110.53 (560-1384; 886)41082.13 ± 43.9 (1044.8-1130.5; 3)16
939.67 ± 95.61 (776-1038; 6)51110 ± 69 (–; 5)17
912 ± 125 (–; 58)6
982.9 ± 91.8 (–; 403)7
                                 892.4 ± 99.3 (673-1119; 93)9
Females784.88 ± 87.29 (525-999; 281)2865.13 ± 106.06 (512-1278; 873)4784.25 ± 45.07 (740-838; 4)15
744.24 ± 102.16 (520-960; 138)1762.18 ± 69.52 (570-955; 175)10879.21 ± 132.62 (429-1055.4; 22)16
715 ± 80 (–; 114)3848 ± 48.03 (822-920; 4)5912± 74 (–; 5)17
787 ± 104 (–; 49)6
716.4 ± 141.1 (–; 75)11
841.1 ± 135.3 (–; 219)7
762.3 ± 107.9 (523-997; 38)9
Body Length (mm) (*)
Adults
Males497.57 ± 20.83 (461-523; 7)15
488.8 ± 46.69 (320-598; 25)16
Females412 ± 36.77 (386-438; 2)15
441.5 ± 25.76 (408-507; 14)16
Hatch–year
Males461.33 ± 34.7 (429-498; 3)16
Females432 ± 11.78 (416-444; 4)15
433.76 ± 14.67 (397-460; 21)16
Total Length (mm) (*)
Adults
Males640 (599–765; 26)13
602 ± 15 (570–641; 144)14
Females538 ± 15 (510–570; 117)1544 (523–630; 15)13
Hatch–year
Males607 (551–683; 7)13
592 ± 19 (563–618; 13)14
Females518 (508–572; 17)13
536 ± 15 (513–566; 24)14
Tail (mm)
Adults
Males187 (162-223;12)12
Females101 (88-112; 12)12
Culmen (mm)
Adults
Males50.8 ± 1.89 (46.05-58.83; 195)450.93 ± 1.74 (48.37-53.18; 7)15
50.53 ± 2.41 (45.5-58.6; 40)550.38 ± 1.99 (44.3-54.43; 24)16
52 (45-54;12)12
Females47.14 ± 1.78 (41.76-53.51; 842)246.64 ± 2 (41.95-54.26; 287)446.57 ± 1.05 (45.82-47.31; 2)15
46.6 ± 1.53 (–; 234)346.85 ± 1.75 (41.56-51.08; 180)1046.85 ± 2.64 (43.27-53.9; 14)16
46.2 ± 2.11 (39-49.7; 48)5
47 (44-49;12)12
Hatch–Year
Males50.77 ± 2.11 (46.47-53.57; 15)451.92 ± 1.2 (50.55-52.8; 3)16
49.5 ± 1.79 (47.3-51.8; 6)5
Females47.15 ± 1.91 (42.58-57.78; 281)246.3 ± 1.94 (40.59-51.36; 160)448.76 ± 3.45 (44.79-53.15; 4)15
46.6 ± 2.14 (–; 114)346.26 ± 1.96 (40.38-50.53; 173)1045.46 ± 2.43 (40.06-49.11; 22)16
47.18 ± 1.58 (45-48.6; 4)5
Wing Chord
Adults
Males273.31 ± 7.91 (250-296, 346)1275.48 ± 6.61 (245-299, 1396)4276.43 ± 5.19 (268-282; 7)15
271.15 ± 7.26 (257-288; 40)5279.67 ± 6.18 (268-289; 24)16
273 (262-283;12)12
272 ± 5.9 (256-290; 216)9
Females258.19 ± 6.87 (236-279; 842)2257.21 ± 6.6 (229-280; 445)4264.5 ± 4.95 (261-268; 2)15
255.53 ± 6.86 (240-280; 198)1252.2 ± 7.37 (231-269; 181)10262.14 ± 8.98 (244-277; 14)16
254.65 ± 5.88 (239-265; 48)5
254.5 (244-265;12)12
253 ± 5.9 (240-265; 72)9
Hatch–Year
Males264.11 ± 7.78 (242-285; 199)1268.31 ± 6.84 (228-291; 886)4274 ± 6.56 (268-281; 3)16
267.67 ± 7.92 (255-279; 6)5
263 ± 6.8 (243-278; 93)9
Females253.9 ± 6.73 (237-276; 280)2252.07 ± 6.73 (231-276; 873)4253.5 ± 3.11 (250-257; 4)15
250.27 ± 7.64 (234-275; 138)1244.48 ± 7.02 (226-263; 173)10256.62 ± 7.3 (242-268; 21)16
246.75 ± 8.06 (238-255; 4)5
245 ± 7.4 (220-258; 38)9
Total Tarsus (mm) (**)
Adults
Males52.62 ± 1.88 (43.46-57.9; 347)152.41 ± 1.85 (47.48-57.68; 195)451.61 ± 1.88 (49.12-54.79; 7)15
50.86 ± 2.09 (45.62-53.57; 23)16
Females49.67 ± 1.93 (41.58-59.60; 842)249.13 ± 2.02 (42.15-57.18; 287)445.96 ± 1.82 (44.67-47.24; 2)15
49.22 ± 1.89 (42.25-53.93; 198)150.53 ± 2.15 (41.1-63; 181)1047.9 ± 1.75 (46.03-51.52; 14)16
50.1 ± 1.53 (–; 234)3
Hatch–Year
Males51.97 ± 2.03 (44.44-57.45; 200)152.97 ± 1.63 (49.68-55.14; 15)452.36 ± 2.1 (50.92-54.77; 3)16
Females49.64 ± 1.87 (42.95-53.95; 281)248.77 ± 1.87 (43.97-53.68; 160)447.71 ± 2.33 (45.12-49.92; 4)15
49.04 ± 2.15 (34.32-53.69; 138)150.35 ± 1.55 (45.81-54.44; 173)1047.07 ± 2.05 (41.3-49.78; 22)16
Middle Toe (mm)
Adults
Males54.8 ± 2.11 (49.11-59.8; 347)1
Females51.08 ± 2.41 (41.35-57.19; 197)1
51.43 ± 1.74 (46.68–55.78; 234)3
Hatch–Year
Males54.09 ± 2.35 (44.70-61.93; 200)1
Females50.76 ± 2.29 (44.29-57.65; 136)1
51.78 ± 1.69 (47.94–55.74; 114)3
Head Length (mm)
Adults
Males107.8 ± 3.06 (97.66-116.34, 347)1
Females98.69 ± 2.98 (79.94-106.74; 192)1
Hatch–Year
Males105.64 ± 2.99 (95.13-113.45; 200)1
Females97.93 ± 3.57 (87.66-116; 137)1