Term
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Definition
Bombus vagans/sandersoni -female
Yellow hairs between wings, 1st abdominal band yellow
2nd abdominal segment entirely yellow and segments 3-6 black. Sides of thorax entirely yellow. |
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Term
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Definition
Bombus ternarius-female
Black stripe between wings. Distinct V shape extending back from center stripe on thorax.
Orange/red on abdominal segments 2-3 |
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Term
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Definition
Bombus citrinus-male
Thorax with yellow near wing base. Black spot in center of thorax often with black hairs coming back from center spot in v shape. Abdomninal segments 1-3 yellow, 4-7 black.
Eyes not large |
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Term
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Definition
Bombus affinis-female
Mostly black hairs between wings with faint V shaped extension back from the middle.
1st abdominal band yellow. 2nd abdominal segment brownish centrally surrounded by yellow. Hair on top of head black with a few yellow hairs. |
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Term
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Definition
Bombus auricomus/pensylvanicus-female
Wide black area between wing bases. Long face. Ab segment 1 black. Ab seg 2-3 yellow. Ab 4-6 black. |
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Term
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Definition
Bombus griseocollis-female
Yellow hairs between wings, 1st abdominal band yellow.
Black on sides of 2nd abdominal segment, with yellow in middle bordered by rusty brown in a swooping shape.
Top of head black. Hair short. |
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Term
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Definition
Bombus impatiens-female
Yellow hairs between wings, 1st abdominal band yellow.
All other abdominal segments black.
Light lemon yellow hairs on top of head and thorax. |
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Term
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Definition
Bombus perplexus-female
Yellow hairs between wings, 1st abdominal band yellow
No obvious spot on thorax. Long hair.
Usually with brown/black on sides of thorax. |
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Term
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Definition
Bombus affinis-female
Mostly black hairs between wings with faint V shaped extension back from the middle.
1st abdominal band yellow. 2nd abdominal segment brownish centrally surrounded by yellow. Hair on top of head black with a few yellow hairs. |
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Term
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Definition
Bombus affinis-queen
Yellow hairs between wings. 1st and 2nd abdominal band yellow.
No brown/rusty patch on 2nd abdominal segment. Head short. |
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Term
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Definition
Bombus auricomus/pensylvanicus-female
Wide black area between wing bases. Long face. Ab segment 1 black. Ab seg 2-3 yellow. Ab 4-6 black. |
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Term
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Definition
Bombus bimaculatus-male
Thorax with yellow near wing base.
Black on sides of 2nd abdominal segment, yellow in middle.
Yellow often in a "w" shape.
Eyes not large. Yellow patch below antennae. |
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Term
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Definition
Bombus borealis-female
Black stripe between wings.
Yellow on ab 1-4.
Yellow on top and front of head. Sides of thorax with brown hairs. |
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Term
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Definition
Bombus vagans/sandersoni-female
Yellow hairs between wings, 1st abdominal band yellow
2nd abdominal segment entirely yellow and segments 3-6 black. Sides of thorax entirely yellow. |
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Term
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Definition
Bombus rufocinctus-male
Thorax with yellow near wing base.
3rd abdominal segment orange. Smaller than many other bumble bees. Head short. |
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Term
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Definition
Bombus fervidus-male
Thorax with black stripe between wings.
Ab 1-4 yellow.
Black on top and front of head.
Sides of thorax yellow. |
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Term
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Definition
Bombus griseocollis-male
Thorax with yellow near wing base and 3rd abdominal segment black.
2nd abdominal segment with yellow in middle bordered by rusty brown in a swooping shape.
Large eyes. |
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Term
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Definition
Bombus bimaculatus-female
Yellow hairs between wings, 1st abdominal band yellow
Black on sides of 2nd abdominal segment,
Yellow in center often in a "w" shape.
Top of head yellow. Sides of thorax yellow. |
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Term
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Definition
Bombus fervidus-male
Thorax with black stripe between wings.
Ab 1-4 yellow.
Black on top and front of head.
Sides of thorax yellow. |
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Term
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Definition
Bombus griseocollis-female
Yellow hairs between wings, 1st abdominal band yellow.
Black on sides of 2nd abdominal segment, with yellow in middle bordered by rusty brown in a swooping shape.
Top of head black. Hair short. |
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Term
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Definition
Bombus affinis/ male
Note the black band between wings, the short face, and the orange patch on T2. |
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Term
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Definition
Bombus auricomus male
Note the large eyes. Black band between wing bases with yellow hairs intermixed. Abdominal segments 1-3 usually yellow, 4-7 black. |
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Term
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Definition
Bombus pensylvanicus male
Thorax with black stripe between wings.
Ab 1-4 yellow.
Black on top and front of head with a few yellow hairs.
Sides of thorax yellow with some black intermixed.
Note the orange at the tip of the abdomen and the wide black band between the wings to distinguish from B. fervidus. |
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Term
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Definition
Bombus impatiens -male
Note the light yellow hair, Abdominal segment 1 is yellow and the rest are black. Yellow patch of hair below antennae |
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Term
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Definition
Bombus vagans/sandersoni -male
Note long face.
Yellow hairs between wings, 1st abdominal band yellow
2nd abdominal segment entirely yellow and segments 3-6 black. Sides of thorax entirely yellow. |
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Term
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Definition
Bombus rufocinctus -male
Thorax with yellow near wing base.
3rd abdominal segment orange. Smaller than many other bumble bees. Head short.
Note yellow on Abdominal seg 2 to distinguish from B. ternarius. |
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Term
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Definition
Bombus borealis- male
Black stripe between wings.
Yellow on ab 1-4.
Yellow on top and front of head. Sides of thorax with brown hairs.
Note brown on side of thorax and yellow on top and front of head to distinguish from B. fervidus. |
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Term
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Definition
Bombus ternarius- male
Black stripe between wings. Distinct V shape extending back from center stripe on thorax.
Orange/red on abdominal segments 2-3. Yellow on 1 and 4. Black on 5-7. |
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Term
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Definition
Bombus terricola -male
Black band between wing bases. Abdominal segment 1 black. Seg 2-3 yellow, 4-7 black.
Note fringe of lighter hairs on T6,7
Short face,
Photo by D.S. Leaon |
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Term
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Definition
Bombus citrinus -female
Note lack of hair on much of abdomen, Often with yellow on sides of abdominal segment 3.
No pollen baskets. |
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Term
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Definition
Bombus rufocinctus -male
Thorax with yellow near wing base and 3rd abdominal segment black or orange.
Smaller than many other bumble bees. Head short. |
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Term
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Definition
Bombus rufocinctus -male
Thorax with yellow near wing base.
3rd abdominal segment orange. Smaller than many other bumble bees. Head short.
Note yellow on Abdominal seg 2 to distinguish from B. ternarius. |
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Term
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Definition
Bombus fervidus- female
Thorax with black stripe between wings.
Ab 1-4 yellow.
Black on top and front of head.
Sides of thorax yellow.
Note black hairs on head and yellow hairs on side of thorax to distinguish from B. borealis. |
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Term
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Definition
Bombus fervidus- female
Thorax with black stripe between wings.
Ab 1-4 yellow.
Black on top and front of head.
Sides of thorax yellow.
Note black hairs on head and yellow hairs on side of thorax to distinguish from B. borealis. |
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Term
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Definition
Bombus terricola-female
Note fringe of lighter hairs at end of abdomen and smaller size to distinguish from B. auricomus and B. pensylvanicus.
Black band between wing bases. Abdominal segment 1 black. Seg 2-3 yellow, 4-7 black.
Note fringe of lighter hairs on T6,7
Short head. |
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Term
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Definition
Bombus bimaculatus-female
Yellow "W" on second abdominal segment
Photo by D.S. Leaon |
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Term
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Definition
Bombus borealis-female
Brown on sides of thorax and yellow on head and face
Photo by D.S. Leaon |
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Term
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Definition
Bombus citrinus-female
Photo by D.S. Leaon |
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Term
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Definition
Bombus griseocollis-female
Brown swoop on second abdominal segment, pollen barely visible on hind leg
Photo by D.S. Leaon |
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Term
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Definition
Bombus impatiens-male
Photo by D.S. Leaon |
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Term
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Definition
Bombus perplexus-female
No obvious spot on thorax
Photo by D.S. Leaon |
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Term
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Definition
Bombus rufocinctus-female
Photo by D.S. Leaon |
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Term
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Definition
Bombus ternarius-female
Black between wings bases extends into "thumbtack" shape
Photo by D.S. Leaon |
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