New York Natural Heritage Program
Yellow Bumble Bee
Bombus (Thoracobombus) fervidus (Fabricius, 1798)
Leif Richardson
Family: Triepeolus (Apidae)

State Protection: Not Listed
The species is not listed or protected by New York State.

Federal Protection: Not Listed

State Rarity Rank: S1
A State Rarity Rank of S1 means: Typically 5 or fewer occurrences, very few remaining individuals, acres, or miles of stream, or some factor of its biology makes it especially vulnerable in New York State.

Global Rarity Rank: G4?
A Global Rarity Rank of G4? means: Apparently Secure globally (most likely) - Conservation status is uncertain, but most likely uncommon in the world but not rare; usually widespread, but may be rare in some parts of its range; possibly some cause for long-term concern due to declines or other factors. More information is needed to assign a firm conservation status.

Did you know?
Yellow bumble bees are a long-tongued bee species (Colla et al. 2011). Due to this, they prefer different flowers as nectar sources than short-tongued bee species, such as red clover and Delphinium (Schweitzer et al. 2012).

State Ranking Justification [-]
Yellow bumble bees appears to be persisting in New York City and Long Island and a couple of disjunct populations in upstate New York (Richardson 2013 and Yanega 2013). There is evidence of a rapid, recent decline of this species in New York (Richardson 2013 and Yanega 2013). In addition, this subgenus (Thoracobombus) has been shown to be significantly more infected by the pathogen Nosema bombi than bumble bees of other subgenera (Cameron et al. 2011). 

Short-term Trends [-]

Long-term Trends [-]