Death / Die-off / Decline | 5 | |
Extreme Temperature | 2 | |
Parasite | 2 | |
Unusual Range / Sighting | 2 | |
Ice / Snow Change | 2 | |
Algal Bloom | 1 | |
Rain on Snow | 1 | |
Seasonal Timing | 1 |
2 | 2 | 4 |
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1 | 1 | 2 | 2 | 2 |
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SUMMER | 3 | |
FALL | 2 | |
WINTER | 2 | |
SPRING | 1 |
United States | 5 | |
Russia | 1 |