Honeybee odometry: performance in varying natural terrain

Area of Science:

• Animal Behavior
• Insect Navigation
• Sensory Ecology

Background:

• Honeybee waggle dances encode flight distance.
• Previous research linked bee distance perception to optic flow (image motion).
• Optic flow is influenced by visual texture and tunnel environments.

Purpose of the Study:

• To investigate if honeybee distance perception in outdoor flight is affected by terrain.
• To determine if the bee's 'odometer' is influenced by varying landscapes.

Main Methods:

• Honeybees were trained to fly 580m routes over land and over a land-water-land sequence.
• Waggle dance duration was recorded to estimate perceived flight distance.
• Visual contrast of the environment was measured for each route.

Main Results:

• Flight over water resulted in a flatter waggle duration-distance relationship compared to flight over land.
• Mean visual contrast was significantly higher over land than over water.
• Honeybee distance perception varied depending on the terrain's visual properties.

Conclusions:

• The honeybee's perception of distance is scene-dependent, not absolute.
• The rate of the bee's 'odometer' is modulated by terrain characteristics.
• These findings raise questions about reliable navigation in complex environments.