
Nightjar’s feeding, migration influenced by lunar cycle
Oct. 15 (UPI) -- The timing of the moon's light-dark cycle drives not only the nightjar's feeding patterns, but also the time of the bird's migration. Nightjars are a family of medium-sized nocturnal insectivores found all over the world. The European nightjar, Caprimulgus europeaus, is characterized by its intricately patterned grey and brown plumage. The birds prefer dry, open country with only a scattering of trees and shrubs. They migrate to sub-Saharan Africa for the winter and return to Europe in the spring to breed. Scientists used a sophisticated GPS tracking system to plot the movement of 39 European nightjars over the course of several weeks. The data showed the birds doubled the amount of time they spent feeding at night when the sky was lit by the moon. The data showed all of...