Climate change shrinks bumblebees range _#2

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Kerr and his colleagues studied insect collections from museums and other places. Their data come from more than 423,000 bumblebees. All were caught between 1901 & 2010 in north America and Europe. They included 67 species, which is about half of the bumble species that live in those regions.
The record also had noted where the bumblebees had been caught. This let the researchers map any changes over that time in where the insects were living.
From 1974 to 2010, the bumblebees' home turf in north America and Europe has hated up. The average high temperatures in these spices areas jumped 2.5° Celsius(4.4° Fahrenheit). During those same years., some of the bumblebees' southern borders moved north by around 300 kilometres.
That's huge, Kerr says. For example, the rusty patched bumblebee, Bombus affinis, was once common in gardens in the southern United States. Today, it has nearly vanished from there. In contrast, some other insects species, such as butterflies, aren't losing any ground.
Bumblebees are very sensitive to beat, Kerr explains. They now seems to be disappearing from the hotter parts of their former ranges. Bumblebees that live in the mountains also hacr moved. They have shifted their ranges about 300 meters upward, to cooler elevations.