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Rusty Patched Bumble Bee Is Listed as Endangered
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Rusty Patched Bumble Bee Is Listed as Endangered

Rusty Patched Bumble Bee Is Listed as Endangered
News

Rusty Patched Bumble Bee Is Listed as Endangered

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The rusty patched bumble bee has become the first-ever bumble bee in the United States, and the first bee of any kind in the contiguous 48 states, to be declared endangered. The endangered designation is made by the U.S. Fish and Wildlife Service under the Endangered Species Act for species that are in danger of becoming extinct throughout all or a portion of their range.

Service Midwest Regional Director Tom Melius said, “Our top priority is to act quickly to prevent extinction of the rusty patched bumble bee. Listing the bee as endangered will help us mobilize partners and focus resources on finding ways right now to stop the decline.”

Once common and abundant across 28 states, the rusty patched bumble bee has experienced a swift and dramatic decline since the late 1990s. Abundance of the rusty patched bumble bee has plummeted by 87 percent, leaving small, scattered populations in 13 states and one province.

“The rusty patched bumble bee is among a group of pollinators, including the monarch butterfly, experiencing serious declines across the country,” Melius said. “Why is this important? Pollinators are small but mighty parts of the natural mechanism that sustains us and our world. Without them, our forests, parks, meadows and shrub lands, and the abundant, vibrant life they support, cannot survive, and our crops require laborious, costly pollination by hand.”

Like other bees, rusty patched bumble bees pollinate many plants, including economically important crops such as tomatoes, cranberries and peppers. Bumble bees are especially good pollinators; even plants that can self-pollinate produce more and bigger fruit when pollinated by bumble bees. Each year, insects, mostly bees, provide pollination services valued at an estimated $3 billion in the United States.

Causes of the decline in rusty patched bumble bee populations are believed to be loss of habitat, disease and parasites, use of pesticides that directly or indirectly kill the bees, climate change, and extremely small population size. Most likely, a combination of these factors has caused the decline in rusty patched bumble bees.

Melius says there are steps the public can now take to help pollinators like the rusty patched bumble bee, such as planting native flowers, even in small plots in urban areas, using a variety that will bloom from spring through fall. Other steps include limiting or avoiding use of pesticides if possible, and always follow label instructions carefully, fostering natural landscapes, and leave grass and garden plants uncut after summer to provide habitat for overwintering bees.

The rusty patched bumble bee once lived in grasslands and prairies of the Upper Midwest and Northeast, but many of those areas are gone. The bee gathers pollen and nectar from a variety of flowering plants. It emerges in early spring and is one of the last bumble bee species to go into hibernation in the fall. Because it is active so long, it needs a constant supply of flowers blooming from April through September.

Rusty patched bumble bee colonies rely on survival of their queen bee, the only member of the colony that survives the winter. In spring, a solitary queen emerges from hibernation, finds a suitable nest site and lays eggs fertilized the previous fall. Worker bees hatch, and the colony grows. New queens replace the old, all workers die and the cycle repeats.

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