Jeremy Cohen
@drjerbs.bsky.social
Early career research scientist at Yale, macroecology, quantitative climate change ecology, avian ecology, GIS and species distribution models, scale in ecology.... birder, photographer, human dad, cat dad, baseball fan
Both traill's I'd say
June 11, 2025 at 6:04 PM
Both traill's I'd say
What's the location?
June 11, 2025 at 6:03 PM
What's the location?
Species’ historical niches are becoming increasingly mismatched with contemporary climates even in a highly mobile taxon like birds, raising concerns about the ability of other wildlife to persist in a warmer world. Other wildlife may have to rely on phenological or behavioral changes.
June 10, 2025 at 4:35 PM
Species’ historical niches are becoming increasingly mismatched with contemporary climates even in a highly mobile taxon like birds, raising concerns about the ability of other wildlife to persist in a warmer world. Other wildlife may have to rely on phenological or behavioral changes.
We found similar results when repeating these analyses using eBird alone or Breeding Bird Survey data, highlighting the robustness of the findings.
June 10, 2025 at 4:35 PM
We found similar results when repeating these analyses using eBird alone or Breeding Bird Survey data, highlighting the robustness of the findings.
Species possessing traits associated with dispersal, such as long-distance migratory behavior or high hand-wing index, succeeded most in limiting their niche loss (partial residual plots).
June 10, 2025 at 4:35 PM
Species possessing traits associated with dispersal, such as long-distance migratory behavior or high hand-wing index, succeeded most in limiting their niche loss (partial residual plots).
Species moving the furthest north succeeded most in limiting their niche loss. Move north, avoid warming. However, only very few species moved north far enough to fully erase their exposure, and in most cases they only partially limited their exposure.
June 10, 2025 at 4:35 PM
Species moving the furthest north succeeded most in limiting their niche loss. Move north, avoid warming. However, only very few species moved north far enough to fully erase their exposure, and in most cases they only partially limited their exposure.
Therefore- species averted much more of their expected exposure in summer, when they are more at risk of physiological consequences of heat stress- but still only avoided half of the expected warming in this season.
June 10, 2025 at 4:35 PM
Therefore- species averted much more of their expected exposure in summer, when they are more at risk of physiological consequences of heat stress- but still only avoided half of the expected warming in this season.
Most redistributions were only partially effective. Species moved their ranges ~0.65° latitude north in both seasons, mitigating their expected exposure by ~1.28 °C in summer (48% of expected if they were stationary), while only mitigating ~0.47 °C (11% of expected) in winter.
June 10, 2025 at 4:35 PM
Most redistributions were only partially effective. Species moved their ranges ~0.65° latitude north in both seasons, mitigating their expected exposure by ~1.28 °C in summer (48% of expected if they were stationary), while only mitigating ~0.47 °C (11% of expected) in winter.
We developed a method to account for biases in tens of millions of species observations from GBIF and evaluate how 406 bird species native to the US and Canada have mitigated their environmental niche loss using geographical redistributions from 2000-2020.
June 10, 2025 at 4:35 PM
We developed a method to account for biases in tens of millions of species observations from GBIF and evaluate how 406 bird species native to the US and Canada have mitigated their environmental niche loss using geographical redistributions from 2000-2020.
As climate change accelerates, species can move poleward (north, in North America) or up mountains to limit their exposure to heat. While these movements have been extensively reported, it remains unclear whether species have succeeded in limiting their exposure to novel conditions.
June 10, 2025 at 4:35 PM
As climate change accelerates, species can move poleward (north, in North America) or up mountains to limit their exposure to heat. While these movements have been extensively reported, it remains unclear whether species have succeeded in limiting their exposure to novel conditions.
Yep. One of the most feeder friendly birds in the Eastern US. Usually one of the first species to find the feeder
November 24, 2024 at 7:33 PM
Yep. One of the most feeder friendly birds in the Eastern US. Usually one of the first species to find the feeder