Loss of night: Artificial light disrupts sex hormones of birds

Kay, Jane
http://www.environmentalhealthnews.org/ehs/news/2014/aug/wingedwarnings6lossofnight

Publisher:  Environmental Health News
Date Written:  04/09/2014
Year Published:  2014  
Resource Type:  Article
Cx Number:  CX16964

Around the world, scientists seeking to answer that question have gathered mounting evidence that city lights are altering the basic physiology of urban birds, suppressing their estrogen and testosterone and changing their singing, mating and feeding behaviors. One lab experiment showed that male blackbirds did not develop reproductive organs during the second year of exposure to continuous light at night.