A sun compass in monarch butterflies

  title={A sun compass in monarch butterflies},
  author={Sandra M. Perez and Orley R. Taylor and Rudolf Jander},

Anatomical basis of sun compass navigation I: The general layout of the monarch butterfly brain

A comprehensive analysis of the brain anatomy of the monarch butterfly that will ultimately aid the understanding of the neuronal processes governing animal migration is provided.

Animal navigation: how animals use environmental factors to find their way

Animals use the geomagnetic field and astronomical cues to obtain compass information. The magnetic compass is not a uniform mechanism, as several functional modes have been described in different

Flight-induced compass representation in the monarch butterfly heading network

Tetrode recordings from tethered flying monarch butterflies are developed to reveal how flight modulates heading representation and it is found that, during flight, heading-direction neurons change their tuning, transforming the central-complex network to function as a global compass.

The Circadian Clock in Lepidoptera

An updated overview of the molecular and anatomical organization of the circadian clock in Lepidoptera is presented, focusing on the importance of the calendar clock in controlling developmental, mating and migration phenotypes and the ecological importance of circadian clocks detailing the complex interplay between the feeding behavior of these organisms and plants.

Effects of non-ionizing electromagnetic fields on flora and fauna, Part 2 impacts: how species interact with natural and man-made EMF

It is time to recognize ambient EMF as a novel form of pollution and develop rules at regulatory agencies that designate air as ‘habitat’ so EMF can be regulated like other pollutants.

Towards a common terminology for arthropod spatial orientation

Here, a unified terminology about spatial orientation strategies employed by arthropods is provided and the current knowledge of the underlying neuronal network is considered to provide a broad and common terminology of orientation strategies.

Compass Cue Integration and Its Relation to the Visual Ecology of Three Tribes of Ball-Rolling Dung Beetles

It is concluded that, despite dramatic intertribal differences in body size and external eye design, the dynamic heading direction network of the South African ball-rolling dung beetles is well adapted to guide the foraging insect in the habitat that it normally traverses.

State-dependent egocentric and allocentric heading representation in the monarch butterfly brain

With tetrode recordings from the brain of tethered flying monarch butterflies, it is shown that compass neurons switch their reference frame in a state-dependent manner, converting the sun from a local to a global cue, an ideal strategy for maintaining a migratory heading over large distance.

A connectome of the Drosophila central complex reveals network motifs suitable for flexible navigation and context-dependent action selection

The first complete electron-microscopy-based connectome of the Drosophila CX is described, including all its neurons and circuits at synaptic resolution, providing a comprehensive blueprint necessary for a detailed understanding of network dynamics underlying sleep, flexible navigation, and state-dependent action selection.




In the late summer of 1940, there was a decided peak in the abundance of the monarch butterfly, Danaus plexippus L. Numerous reports were received by the Royal Ontario Museum of Zoology, and a

Magnetic Butterflies A Case Study of the Monarch (Lepidoptera, Danaidae)

Recent biomagnetic research concerning lepidopterans is discussed, focusing upon the monarch butterfly, Danaus plexippus, focusing on the interactions of magnetic fields and behavioral responses.

Monarch butterfly orientation: missing pieces of a magnificent puzzle

  • Brower
  • Environmental Science
    The Journal of experimental biology
  • 1996
A new hypothesis is presented that the orientation of adult monarchs undergoes a continual clockwise shifting throughout the 3-5 generations, rotating by 360 in the course of the year, consistent with the timing of arrivals and the relative abundance of the successive generations of monarchs throughout eastern North America.