While bumblebees are not expanding northward, some are retreating to higher elevations as the temperature warms. This animation shows the range compression for a hypothetical North American species forced to shift its elevation by more than 300 metersa figure consistent with newly observed data. (Animation by Jeremy T. Kerr) (0:12)
/https://public-media.si-cdn.com/filer/c1/eb/c1ebdf6d-0bee-404c-b251-1ce3182846a1/sm0c1v3__0nuk0.png)
