National Geographic : 1910 May
Photo by N. A. Cobb Copyright, 1910, by the National Geographic Magazine MALE HOUSE-FLY RESTING ON GLASS AND SEEN FROM BELOW In addition to two claws, each of the six feet is supplied with two light colored sticky pads. Germs and spores stick to these pads, and are thus carried from place to place with great rapidity, for the fly travels fast and far on its own wings, and on cars, boats, and other moving things. The fly cleans its feet carefully whenever they become contaminated, thus removing many of the germs that would otherwise be spread, but not all. ... . - ..