Bumblebees land rapidly and robustly using a sophisticated modular flight control strategy

Area of Science:

• * Animal behavior and biomechanics
• * Insect flight dynamics and visual control

Background:

• * Flying animals often rely on visual cues for controlled landings.
• * Previous studies on honeybees show continuous deceleration during landing.

Purpose of the Study:

• * To investigate how bumblebees (Bombus terrestris) use radial optic expansion for landing deceleration.
• * To compare bumblebee landing strategies with those of other flying animals.

Main Methods:

• * Analysis of flight dynamics from 4,672 landing maneuvers of foraging bumblebees.
• * Quantification of optic expansion cues and deceleration patterns.

Main Results:

• * Bumblebees exhibit modular landing with distinct deceleration bouts, not continuous deceleration.
• * During each bout, bumblebees maintain a constant relative rate of optic expansion.
• * Bumblebees transition to higher constant optic expansion rates between bouts, similar to pigeons and hummingbirds.

Conclusions:

• * The discovered modular landing strategy is faster than honeybee strategies and aids bumblebee foraging efficiency.
• * This strategy has implications for developing bio-inspired landing systems for flying robots.