It's not only the world's bees that are dying off - birds are also now threatened by pesticides. The message of 'Silent Spring' is on the way back.

New research has identified the world’s most widely used insecticides as the key factor in the recent reduction in numbers of farmland birds.
The finding represents a significant escalation of the known dangers of the insecticides and follows an assessment in June that warned that pervasive pollution by these nerve agents was now threatening all food production.

Details:
http://www.theguardian.com/environment/2014/jul/09/neonicotinoids-farmland-birds