Honeybees use the skyline in orientation

Area of Science:

• Animal behavior
• Navigation
• Sensory ecology

Background:

• View-based navigation relies on comparing learned and current landscape views.
• The skyline, a distant and stable landscape feature, is potentially useful for navigation.
• While ants use skylines, their use by flying insects like honeybees remains unconfirmed.

Purpose of the Study:

• To investigate whether honeybees use the skyline for orientation.
• To determine if honeybees can navigate using only skyline cues.

Main Methods:

• Honeybees were trained to a feeder surrounded by an artificial skyline replica.
• Departure directions towards the nest were recorded using overhead video cameras.
• Experiments were conducted under overcast skies to exclude celestial navigation cues.

Main Results:

• When the artificial skyline was rotated, the bees' departure directions rotated correspondingly.
• This demonstrates that honeybees oriented their flights using the artificial skyline alone.
• Celestial cues were eliminated, isolating the skyline as the sole orientation factor.

Conclusions:

• Honeybees demonstrably use the skyline for orientation during homing flights.
• Findings suggest the skyline's importance in long-range homing for honeybees.
• Further research is needed on altitude, ultraviolet light, and resolution of skyline features.