STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Cat flea's head. Coloured scanning electron micrograph (SEM) of the head of a cat flea (Ctenocephalides felis). Its eyes (pink) are seen at centre left and right. The comb-like spines (ctenidia, upper centre) help to anchor the flea to the host's fur. The mouthparts (mandibles, lower centre) are modified to pierce the skin and suck blood. Most fleas remain on their host only while feeding. Magnification: x60 at 6x7cm size.
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