(CNN)The American bumblebee is in trouble in America's neighbor to the north.
A group of scientists from York University and University of Vermont looked at three different measurements and found that Bombus pensylvanicus, commonly known as the American bumblebee, is declining in Canada.
The number of areas where the American bumblebee can be found in the country decreased by 70% from historical rates, according to the study.
Compared to other species of bumblebee, American bumblebees have decreased in abundance in Canada by 89%. And their extent of occurrence, commonly considered to be its range, decreased by 37%. The report says the bee should be assessed as critically endangered.
"(The occurrence) is much more patchy and isolated than previously," says Victoria MacPhail, a PhD student at York University and the lead author on the study.
The researchers compiled information from three separate sources: the Bumble Bees of North America (BBNA) database, records from the Bumble Bee Watch citizen science program verified by experts, and their own field surveys. They then compared historic data from 1907 to 2006 to numbers from 2007 to 2016.
Bumblebees are crucial to the environment
The study is just the latest evidence that bee populations are declining in North America and other parts of the world.