Synopsis: Lévy Flight of the Bumblebee

Bumblebee flight patterns reveal how the presence of spiders causes bees to modify their foraging strategies.

Bumblebees visit flowers to collect nectar, often visiting multiple flowers in a single patch. Mathematically, a bee’s path has been described by a Lévy flight, which gives flights over long distances a larger weight than in an ordinary random walk model. This description is controversial, however, as bumblebees in the wild are under the constant risk of predators, such as spiders, which likely modifies their foraging behavior.

Writing in Physical Review Letters, Friedrich Lenz at Queen Mary, University of London, UK, and colleagues present a statistical analysis of the velocity distribution of bumblebees. They draw from experiments that track real bumblebees visiting replenishing nectar sources under threat from “artificial spiders,” which can be simulated with a trapping mechanism that holds the bumblebee for two seconds. The team finds that in the absence of spiders, the bumblebees forage more systematically and go directly from flower to flower. When predators are present, however, the bumblebees turn around more often, highlighting a more careful approach to avoid spiders. The analysis indicates that for real foraging, factors such as bumblebee sensory perception, memory, and daylight cycles must also be taken into account in addition to the presence of predators, all of which may cause cause deviation from a Lévy flight pattern. – Daniel Ucko


Features

More Features »

Subject Areas

Nonlinear DynamicsBiological PhysicsStatistical Physics

Previous Synopsis

Quantum Physics

Quantum Pistons

Read More »

Next Synopsis

Astrophysics

Electron Bounce

Read More »

Related Articles

Viewpoint: A Toy Model for Active Interfaces
Biological Physics

Viewpoint: A Toy Model for Active Interfaces

A new statistical model predicts the evolving shape of a cellular membrane by accounting for the active feedback between the membrane and attached proteins. Read More »

Viewpoint: The Dance of Water Molecules around Proteins
Biological Physics

Viewpoint: The Dance of Water Molecules around Proteins

A combination of experiments, simulations, and modeling has revealed the anomalous diffusion of water molecules along the surfaces of proteins. Read More »

Viewpoint: Landauer Principle Stands up to Quantum Test
Quantum Information

Viewpoint: Landauer Principle Stands up to Quantum Test

A fundamental limit on the heat produced when erasing a bit of information has been confirmed in a fully quantum system. Read More »

More Articles