50.7 MB (3.0 MB compressed)
4841 x 3661 pixels
40.9 x 31.0 cm ⏐ 16.1 x 12.2 in (300dpi)
STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Budgerigar (Melopsittacus undulatus) beak, coloured scanning electron micrograph (SEM). The outside surface of the beak, seen here, is covered by a thin horny sheath of keratin called the rhamphotheca. This bird is a highly sociable type of parrot. Magnification: x400 when printed 10 centimetres wide.
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