Southern Plains Bumble Bee (Bombus fraternus), a State Special Concern bumble bee, is associated with prairies, meadows, and grasslands, though they have also been found in high-quality urban forb plantings. Nectar plants include milkweed (Asclepias species), sunflower (Helianthus species), rattlesnake master (Eryngium species), blazing star (Liatris species), and coneflower (Echinacea species). It also uses thistles (Cirsium species) and goldenrod (Solidago species) in late-summer and fall. Adults are active from spring to fall.