Bombus affinis, commonly known as rusty patched bumble bees were once common throughout the east and upper Midwest but its population has recently had a drastic decline. The USFWS listed the rusty patched bumble bee as Endangered under the Endangered Species Act.
Rusty-patched bumble bee worker diagnostic traits:
Apply today for an Individual Support Grant by visiting Blue Thumb's website. Applications will be accepted through February 15, 2022.
View Verifiable Observations of Bombus affinis on INaturalist: https://www.inaturalist.org/taxa/121519-Bombus-affinis
USFWS Rusty Patched Bumble Bee Map: