Male mallard: Pleasant to the eye of more use

Male mallard: Pleasant to the eye of more use
It is reported the male mallard (Anasplatyrhynchos, Fig. as above) The spiral genitals are well-known all over the world because it is long.

Nowadays, the scientist finds, they have things that others are worth showing off. The seminal fluid of the mallard and a kind of common bacterium - -Mix Escherichia coli together, researchers notice, the seminal fluid of these ducks can kill bacteria.

Researchers say on the " biological bulletin " network edition of April 12, the seminal fluid of those beaks more nobly drake has the strongest ability to resist fungus, bacteria eliminated are 3 times that of drake with dim beak.

These discovery indicate, mother's mallard is not only attracted because the latter's gaudier custom by the drake bright in luster, being still because of them will only transmit the less bacterium in the course of mating. (Luis Zhao)

Male mallard: Pleasant to the eye of more use