Falcon down feather, SEM

Videonummer 11935898
Scanning electron micrograph (SEM) of a down feather from a lanner falcon (Falco biarmicus). Down feathers are simple feathers beneath the external feathers, which help to insulate the bird. They lack the organised blade-like structure of the external and especially the flight feathers, instead having a short central stem (rachis, not seen), relatively few barbs (one seen here) and fine barbules that lack the interlocking hooks of the outer feathers. The lanner is a large falcon that inhabits open country in Africa, southest Europe and western Asia. The barbules here move due to electrostatic interactions during the scans.
Lizenzart: Lizenzpflichtig
Credit: Science Photo Library / NANOFLIGHT (R) MOVIE, STEFAN DILLER
Modell-Rechte: nicht erforderlich
Länge: 30 Sekunden
Seitenverhältnis: 16:9
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