Foraging errors play a role in resource exploration by bumble bees (Bombus terrrestris)

Area of Science:

• Animal behavior
• Ecology
• Cognitive science

Background:

• Cognitive performance in animals often aligns with ecological needs.
• Variation in learning ability exists even within closely related individuals, such as bumble bee workers.

Purpose of the Study:

• To investigate the relationship between foraging errors and foraging success in bumble bee workers.
• To determine if learning 'errors' represent an alternative foraging strategy.

Main Methods:

• Bumble bees (Bombus terrestris) were trained to distinguish rewarded yellow flowers from unrewarded blue flowers.
• Researchers recorded individual bees' errors (visits to unrewarded flowers).
• Bees were then tested on their speed of discovering a more profitable food source (familiar blue or novel green flowers).

Main Results:

• Error-prone bees discovered novel food sources significantly faster than accurate bees.
• The time to discover a new, more profitable food source correlated positively with foraging success.
• These findings suggest a link between learning errors and successful foraging.

Conclusions:

• Foraging errors may represent an 'exploration' strategy, advantageous in dynamic environments.
• This exploration strategy could explain variations in learning performance among social insect foragers.
• Individual differences in foraging strategies contribute to colony-level adaptation.