Author 'Nicole.barberon' (Id 189660 ) : The legs of the grebe, set very far back, as the propellers at the prow of a boat are remarkable. They provide propulsion in the water. The positioning of these legs makes these birds almost incapable of locomotion on land. I had never before seen tabs of this beautiful bird when one of them, located near the shore, did some stretching for my greatest pleasure. Lien : Http://nicole.fond-ecran-image.com/blog-photo/