Regulatory protections for bumble bees under the California Endangered Species Act (CESA) present new challenges for consultants assessing project impacts and developing mitigation strategies. This presentation provides an applied overview of current methods for habitat assessment, survey timing, and documentation consistent with CDFW and CEQA requirements. Emphasis is placed on evaluating habitat suitability for Crotch’s bumble bee (Bombus crotchii) and other listed or candidate species through integrated field surveys, floral resource mapping, and available occurrence data. Case studies illustrate how habitat quality classifications inform impact analysis, risk assessment, and permitting pathways. The presentation also reviews mitigation and conservation measures, including avoidance, restoration, and compensation through approved banks or research programs. This talk highlights lessons learned from field implementation and agency coordination to support effective regulatory compliance and conservation for California’s bumble bees.