The fauna of Champagne-Ardenne is highly diverse, with over 250 species of nesting birds and almost 70 mammals. Records of the wild animals identified from bones found at archaeological sites are far from representative. Red and roe deer, and wild boar enjoyed the woodland fringes where they found plenty of shelter. Highly mobile, wild boar could live equally well out on the plain or in the undergrowth. These large animals were only found very occasionally in the diet of the local Gauls. Wolf bones show that these animals were also a presence. A few birds (cormorant, mallard duck) and small animals (marten) have left feathers and fur. The Aisne valley lies in northern Champagne, home to the region's widest variety of birds. The river was full of fish and fishing was a major activity. Amphibians and micromammals are well represented in the burial pits and storage huts of the Gallic village of Acy-Romance where they were trapped: common frogs, moles, voles, dormice, wood mice and field mice. There is also plenty of evidence of weasels, a predator of small rodents.