Single barb from a down feather. Coloured scanning electron micrograph (SEM). Rows of filaments,known as barbs,project from either side of the rachis (central shaft) of a feather. Along the length of each barb are smaller filaments,known as barbules. Downy feathers insulate a bird. Very young birds are clad only in down. Magnification: x250 when printed at 10 centimetres wide | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Gschmeissner, Steve |
Taille de l’image : | 4839 px × 3611 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |