This is a photograph of a bull:
Bulls are male cows; they play an integral part in the production of calfs, which in parts of the world either become the veal that your hard work has earned, or more cows or bulls. Most farmers don't particularly like to have bulls around, due to their unwieldy/impalely nature. They prefer to have bulls briefly on their farm so they and their cows can go to dinner and a movie, so to speak.
This is a photograph of a bulldog:
Just to be clear, bulldogs can be either male or female. I know, pretty weird. The reason for this is that bulldogs' temperament simply resembles that of the impetuous bull. Neither male nor female bulldogs take part in the production of cows. Also worthy of note is that bulldogs are much smaller than your average bull.
This is a photograph of a bulldog ant:
The reason for the name is that bulldog ants' temperament simply resembles that of the impetuous bulldog. Please take note that the bulldog ant is related only to bulldogs by way of their shared kingdom, animalia. Also worthy of note is that bulldog ants are much smaller than your average bulldog.
This Is A Bulldog Ant Bacterium