Wild bee populations are declining where they are needed most. Between 2008 and 2013 wild bee populations declined in 23% of the United States, and were low in 39% agricultural areas dependent on pollinators.

See the source article by following the link below:
Wild bee populations are declining where they are needed most. Between 2008 and 2013 wild bee populations declined in 23% of the United States, and were low in 39% agricultural areas dependent on pollinators.