Some of California's most crucial insects seem to have gone missing. A new study suggests that populations of once-abundant bumble bee species in California may have experienced serious decline, after researchers conducted the first statewide survey of bumble bee species in 40 years.
Some of California's most crucial insects seem to have gone missing. A new study suggests that populations of once-abundant bumble bee species in California may have experienced serious decline, after researchers conducted the first statewide survey of bumble bee species in 40 years.
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