Abstract

Overview

A study exploring the behavior of zebra finches using their light-dependent magnetic compass under various light conditions to understand magnetoreception.

Findings

• Zebra finches use a magnetic compass that relies on a light-induced, radical-pair mechanism mediated by cryptochromes.
• Under 521 nm green light and low irradiance, finches oriented correctly using their magnetic compass.
• Disorientation occurred in the presence of a 1.4 MHz RF-field, indicating the mechanism's sensitivity to electromagnetic interference.
• Variable orientation was observed under different light spectra, with disorientation under higher irradiance blue light and correct orientation under high-irradiance indigo light, both disrupted by RF-field exposure.

Conclusion

The study confirms the role of cryptochromes in avian magnetoreception and illustrates the impact of electromagnetic fields on their navigation capabilities, emphasizing the significance of understanding electromagnetic field effects on biological systems.