The U.S. Geological Survey (USGS) is offering a cooperative agreement opportunity for partners affiliated with the Rocky Mountain Cooperative Ecosystem Studies Unit (CESU) to conduct research focused on the immunology of imperiled bumble bee species. The primary objective of this funding is to develop tools aimed at the recovery of endangered bumble bees, specifically Bombus affinis and Bombus occidentalis, which have experienced significant population declines due to the spread of the pathogen Variomorpha bombi. This research is critical for understanding and mitigating the impacts of this pathogen on bumble bee populations, which play a vital role in ecosystem health and biodiversity. Interested applicants must be participating partners of the Rocky Mountain CESU, with funding available ranging from $1 to $30,000, and a total program funding of $399,000. The application deadline is March 7, 2025, and inquiries can be directed to Faith Graves at fgraves@usgs.gov.