Table 1.
Numbers of monarchs, captive-reared and tagged and wild-tagged by organizations and citizen scientists during 2017–2019 (WSP = Washington State Penitentiary, WSU = Washington State University, CCC = Cowiche Canyon Conservancy, WBA = Washington Butterfly Association, IDFG = Idaho Fish and Game, USFWS = United States Fish and Wildlife Service. Italics separate wild-tagged from captive.
| Location | 2017 | 2018 | 2019 | 2017–2019 |
|---|---|---|---|---|
| Washington | ||||
| WSP (Walla Walla) | 494 | 580 | 105 | 1179 |
| WSU (Yakima) | 1972 | 452 | 121 | 2545 |
| CCC (Yakima) | 192 | 245 | 160 | 597 |
| WBA (Redmond, Spokane) | 442 | 390 | 0 | 832 |
| Wild-tagged | 30 | 0 | 0 | 30 |
| Total (WA) | 3130 | 1667 | 386 | 5183 |
| Idaho | ||||
| IDFG (Bayview) | 863 | 875 | 311 | 2049 |
| USFWS/IDFG (Boise) | 19 | 0 | 57 | 76 |
| Wild-tagged | 278 | 28 | 27 | 333 |
| Total (ID) | 1160 | 903 | 395 | 2458 |
| Oregon | ||||
| Central and Northern | 176 | 68 | 116 | 360 |
| Southern | 1987 | 1041 | 3157 | 6185 |
| Wild-tagged | 59 | 15 | 1 | 75 |
| Total (OR) | 2222 | 1124 | 3274 | 6620 |
| Far N California | ||||
| Tulelake, Montague, Smith R. | 8 | 31 | 165 | 204 |
| Wild-tagged | 12 | 0 | 0 | 12 |
| Total (CA) | 20 | 31 | 165 | 216 |
| Montana | ||||
| Missoula | 0 | 0 | 13 | 13 |
| Total (MT) | 0 | 0 | 13 | 13 |
| Total (PNW): Wild | 379 | 43 | 28 | 450 |
| Total (PNW): Reared | 6153 | 3682 | 4205 | 14,040 |
| Total (PNW): All | 6532 | 3725 | 4233 | 14,490 |