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321:. Queens emerge from hibernation in late January, the first workers appear in early March, and the males follow by the end of April. The colony dissolves in late October, when all the inhabitants die except the new queens.
251:), and the two can only be definitively told apart by the structure of the male genitalia. The obscure bumblebee tends to have longer hairs, however, and yellow hairs are found on the underside of the abdomen, where
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Hatfield, R.; Jepsen, S.; Thorp, R.; Richardson, L.; Colla, S. (2014).
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444:. Bulletin of the California Insect Survey Volume 23. pp. 33–35.
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283:, the heath family, and males have been noted most often on
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This bumblebee has been noted on 19 families of plants. The
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The Bee
Inventory Plot. San Francisco State University.
396:
Chapter 9, part 2: Pests
Attacking Man and His Pets.
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363:10.2305/IUCN.UK.2014-3.RLTS.T44937726A69000748.en
438:Bumble Bees and Cuckoo Bumble Bees of California
243:The obscure bumblebee is very similar to the
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50:
31:
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255:has only black hairs on the underside.
223:, where its distribution extends from
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349:IUCN Red List of Threatened Species
699:Fauna of the Western United States
435:Thorp, R. T.; et al. (1983).
14:
679:IUCN Red List vulnerable species
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221:West Coast of the United States
1:
694:Hymenoptera of North America
715:
689:Insects described in 1927
189:
182:
72:Scientific classification
70:
48:
39:
30:
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384:DiscoverLife species map
356:: e.T44937726A69000748.
279:are most often seen on
267:are most often seen on
245:yellow-faced bumblebee
394:Ebeling, R. (2002).
233:Southern California
175:B. caliginosus
42:Conservation status
512:Bombus caliginosus
482:Bombus caliginosus
417:McFrederick, Q.S.
401:2015-06-19 at the
342:Bombus caliginosus
215:, is a species of
208:Bombus caliginosus
193:Bombus caliginosus
25:Bombus caliginosus
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665:
651:Open Tree of Life
474:Taxon identifiers
423:of San Francisco.
213:obscure bumblebee
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406:Urban Entomology
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403:Wayback Machine
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253:B. vosnesenskii
249:B. vosnesenskii
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16:Species of bee
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184:Binomial name
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455:. Retrieved
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367:. Retrieved
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199:Frison, 1927
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612:NatureServe
573:iNaturalist
506:Wikispecies
369:20 November
239:Description
129:Hymenoptera
684:Bumblebees
673:Categories
457:2013-07-29
325:References
297:sweet peas
285:Asteraceae
225:Washington
162:Pyrobombus
157:Subgenus:
109:Arthropoda
57:Vulnerable
289:ceanothus
281:Ericaceae
217:bumblebee
169:Species:
95:Kingdom:
89:Eukaryota
617:2.819678
604:44937726
521:BugGuide
497:Q1889779
491:Wikidata
399:Archived
293:thistles
269:Fabaceae
227:through
135:Family:
105:Phylum:
99:Animalia
85:Domain:
62:IUCN 3.1
565:1340334
552:1065371
319:clovers
315:willows
301:lupines
265:workers
259:Ecology
145:Genus:
125:Order:
119:Insecta
115:Class:
60: (
656:713469
643:164892
630:207623
591:714792
578:344228
526:891630
448:
421:Bombus
317:, and
277:queens
273:legume
271:, the
229:Oregon
211:, the
150:Bombus
139:Apidae
442:(PDF)
310:Rubus
625:NCBI
599:IUCN
586:ITIS
560:GBIF
539:MFFP
446:ISBN
371:2021
354:2014
547:EoL
534:CoL
358:doi
231:to
675::
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536::
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352:.
346:.
313:,
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303:,
299:,
295:,
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235:.
460:.
373:.
360::
344:"
340:"
247:(
64:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
