Deer - Song Bird Study

"Working with the Canadian Wildlife Service, Jean-Louis Martin and colleagues surveyed songbird, deer, vegetation and insect populations on 37 islands.They found the bird species that relied most on understorey vegetation for food and nesting were most affected by the deer. Their numbers were 93 per cent lower than those on deer-free islands."

From issue 2510 of New Scientist magazine, 30 July 2005, page 14