From: Andy Soos, ENN
Published December 15, 2010 02:17 PM
In this case conservationists have been so successful at protecting endangered birds in a Spanish nature reserve that the birds are now killing the reserve's ancient cork oak forest. This may mean some bird colonies will have to be moved to protect the trees, some of which date back to the seventeenth century.
The trees are the last part of a huge cork oak forest which once covered south-western Spain, and provide food for deer, wild boar and small mammals. The endangered Iberian Lynx often also uses old cork oak trees as breeding dens. With around 70 nests in any one tree, researchers found that the nesting birds produce so much poo it upsets the delicate balance of the soil which nurtures the oaks