Mother Nature doesn't like Organic food:

A three-year study by Newcastle University has found that wild birds are not swayed by the organic label, but instead prefer the more protein-rich, conventional food that will help them to survive the winter....

"Protein is an essential nutrient in the diet of all birds and mammals and getting enough of it -- especially in winter -- can be hard.

"We showed that when given free choice, wild birds opt for the conventional food over the organic, and the most likely explanation is its higher protein content.

"This study is only looking at one aspect of the organic food debate... But it does raise questions about the nutritional benefits of organic food and what consumers are being led to believe."