Yellow Bumble Bee, Bombus fervidus

Excerpted from Bumble Bees of Wisconsin

Yellow Bumble Bee, Bombus fervidus Not super common, this species is recognizable for being almost entirely yellow, except the last part of their abdomen. Look for them in open fields and meadows.

  Physical Description

Body hair medium length and even. Thorax mostly yellow, with a band of black hairs between the base of wings. Occasionally, thorax is entirely yellow. First through forth abdominal segments fully yellow, with segments 5-6 black. Queens distinctly larger than workers. Males usually with yellow hairs on the face, forming a “beard” or “mustache” feature. Males also lack corbiculae, or the flattened midleg of the hind leg used for transporting pollen.

  • Queen length: 19-21 mm
  • Female Worker length: 10 mm
  • Drone length: 11-20 mm

  Activity Period

Yellow Bumble Bee activity period Relatively standard colony life cycle, but little is known about this species apart from historical records. Look for queens emerging in May.


Yellow Bumble Bee, Bombus fervidus graphic Historical records suggest that Bombus fervidus is found throughout Wisconsin, however more thorough surveys are required.

  Preferred Flowers

 Bee Balm

Bumble Bee Videos

 Buzz Pollination
 Slo-Mo Footage of a Bumble Bee Dislodging Pollen
 Look Inside a Bumblebee Nest
 How to Build a Bumble Bee House
 Development of Colony and Nest in the Bumblebee

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