I find Wikipedia a great data base giving information which no other encyclopedia would give.
I do my bit when somebody tries to mutilate (not edit) an article by, for instance, deleting whole paragraphs or links just because he/she does not like it.
The martial eagle (Polemaetus bellicosus) is a large eagle native to sub-Saharan Africa. A species of the booted eagle subfamily (Aquilinae), it has feathering over its tarsus. One of the largest and most powerful species of booted eagle, it is a fairly opportunistic predator that varies its prey selection between mammals, birds and reptiles. It is one of a few eagle species known to hunt primarily from a high soar, by stooping on its quarry. Currently, the species is classified as endangered by the International Union for Conservation of Nature. This martial eagle was photographed in the Matetsi safari area in Zimbabwe.Photograph credit: Charles J. Sharp