Land Mammals | 4 | |
Land | 3 | |
Insects | 1 | |
Microbes | 1 | |
Weather | 1 |
Permafrost Change | 5 | |
Death / Die-off / Decline | 2 | |
Erosion | 2 | |
Extreme Temperature | 2 | |
Unusual Size / Abundance | 1 | |
Parasite | 1 | |
Rain on Snow | 1 | |
Seasonal Timing | 1 | |
Ice / Snow Change | 1 | |
Pathogen | 1 |
1 | 2 | 1 | 4 |
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2 | 4 | 2 |
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United States | 4 | |
Canada | 1 | |
Russia | 1 |