The research is focalised on the biological risks for afforestations. Wild animals can damage the trees by browsing, fraying, debarking and bark gnawing : the responsible animals are mainly rodents (voles, field mice, rats, squirrels), the leporine species (hares and rabbits) and the cervidae species (stags and deer). The objectives of this study are to choose an appropriate method of protection : global protection (mechanical or electric fencing) and total or partial individual protection (spiral or slit protections, wire or plastic tree shelters and tube-shaped tree shelters with or without stakes, wedded wire protection, chemical repellents …). Twelve types of individual protections are tested in field for noble and precious broad-leaved to compare their characteristics (weight, storage, transport, fixation, life span, efficiency, deformation, need to be removed…) and their influence on the trees (growth in height, rubbing, stem deformation, damage risks …).