New York Natural Heritage Program
American Bumble Bee
Bombus (Thoracobombus) pensylvanicus (De Geer, 1773)
Kristy Baker
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: G3G4
A Global Rarity Rank of G3G4 means: Vulnerable globally, or Apparently Secure -- At moderate risk of extinction, with relatively few populations or locations in the world, few individuals, and/or restricted range; or uncommon but not rare globally; 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 single conservation status.

Did you know?
Bumble bees are not as aggressive as other types of bee, wasps, and hornets and rarely sting unless their nest is disturbed (Schweitzer et al. 2012).

State Ranking Justification [-]
There is a single record in New York since 2000 from Saratoga County and a few records from the 1990s (Richardson 2013 and Yanega 2013). There is evidence of a sharp decline in New York, both short-term and long-term (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 [-]