Western bumble bee population declines sharply

The western bumble bee was historically very common throughout the western United States and Canada. However, in the last 20 years it has declined by more than 90%. Disease is the probable cause.

Frontiers Are Bumblebees Relevant Models for Understanding Wild Bee Decline?

A nearly 50 percent decline in bumblebee habitat in North America is tied to climate change, scientists say - The Washington Post

Reasons Why Bees Are Dying

Federal officials consider adding 10 more species, including big bumble bee, to endangered list – NBC 5 Dallas-Fort Worth

Decline of six native mason bee species following the arrival of an exotic congener

Worldwide occurrence records suggest a global decline in bee species richness - ScienceDirect

Temporal trend of rarified bumble bee species richness from 1877 to

Worldwide occurrence records suggest a global decline in bee species richness - ScienceDirect

BestOfSwla HONEYBEE POPULATIONS HAVE DECLINED DRASTICALLY IN THE LAST SEVERAL YEARS. - BestOfSwla

Test of the invasive pathogen hypothesis of bumble bee decline in North America

Nearly 40% decline in honey bee population last winter 'unsustainable,' experts say - ABC News

Managed honey bees as a radar for wild bee decline?

Western bumble bee population declines sharply

Santa Clara Bumble Bee Survey - UC BERKELEY URBAN BEE LAB

Western bumble bee population declines sharply