Iowa State University researchers are part of a multi-state effort to map out where a rare type of bumble bee lives and to figure out what sorts of habitat it prefers. I-S-U grad student Erika Ibarra-Garibay says they’re assembling clues about the genetic diversity and overall health of what’s known as the rusty patched bumble bee.

Teams from I-S-U surveyed 50 sites across Iowa twice in recent months and they only found the rusty patched bumble bee at four locations — in Ames, Brushy Creek State Recreation Area near Fort Dodge, and two locations near Dubuque and Yellow River State Forest.

Another I-S-U grad student and team member, Kelsey Shepherd, says the findings could help wildlife managers and land stewards reverse the decline of bee populations and support other pollinators more broadly.

The I-S-U teams are also collecting data on the threatened American bumble bee. Once widespread across the eastern U.S. and Upper Midwest, the number of rusty patched bumble bees has plummeted nearly 90% since the 1990s.

While the rusty patched bumble bees were only found at four of the 50 Iowa sites, they were abundant in a few of those sites. Team leaders say that suggests there are survivor populations out there and it’s not too late for conservation action in Iowa.