The data in Table 1 are the result of several dedicated researchers who spend their winters trapping and banding Snowy owls. This is the largest data set of winter body mass records on live Snowy Owls anywhere in the world. Collectively these researchers provided ~150 years of experience.
| Location | Mean Live Mass | Mean Chord | Mean Tail |
|---|---|---|---|
| Male | g (n) | mm (n) | mm (n) |
| Massachussets1 | 1674.2 (286) | 386.9 (286) | 223.3 (286) |
| Minnesota2 | 1657.0 (170) | 393.9 (170) | 209.6 (160) |
| New York3 | 1596.9 (197) | 393.1 (197) | 223.1 (143) |
| Alberta4 | 1525.5 ( 26 ) | 385.5 ( 26 ) | 204.6 ( 26 ) |
| Alberta5 | 1650.9 (162) | 396.0 (165) | 217.9 (162) |
| Saskatchewan6 | 1600.9 (154) | 392.7 (153) | 209.8 (137) |
| Total | 1636.9 (995) | 391.7 (869) | 217.4 (914) |
| Female | g (n) | mm (n) | mm (n) |
| Massachussets1 | 2128.4 (165) | 424.3 (165) | 239.7 (165) |
| Minnesota2 | 2179.9 (262) | 429.5 (262) | 225.9 (252) |
| New York3 | 2087.3 (196) | 434.4 (196) | 246.3 (142) |
| Alberta4 | 1893.2 ( 69 ) | 420.1 ( 69 ) | 219.3 ( 69 ) |
| Alberta5 | 2096.1 (289) | 428.6 (292) | 236.6 (288) |
| Saskatchewan6 | 2119.0 (208) | 428.6 (206) | 226.5 (188) |
| Total | 2109.8 (1189) | 428.6 (1190) | 233.5 (1034) |
Source:
1Norman Smith, unpublished data; 2David Evans, unpublished data; 3Thomas McDonald, unpublished data; 4Mike Blom, unpublished data; 5Hardy Pletz, unpublished data; 6Dan Zazelenchuk, unpublished data.