Sounds like a Blue Heeler, possible Border Collie/Heeler mix.
any dog could be black with a white spot on its head
Jeweled spiders are white with red spots on their backs. They come in a variety of different colors and are very beautiful.
Droopy dogs
Phidippus audax
There are several factors involved here: is this in winter or summer? Is the animal viewed at night or at day? If it were winter, a black cow is easier to spot than a white one. If it was summer, then a white bovine is easier to spot than a black one. At night, a white cow is easier to see than a black one, and vice versa in the day time.
black widows
White, because it is easier to spot in the black background of space, and it reflects light in order to prevent the astronaut from over heating.
Carpet Beetles
yes a black ands white molly does mates and the fries will be in the mixed colour might they may be half white and half black or white spot on blaack colour
It is a lone star tick.
It is a lone star tick.
The channel catfish.
White and Black spots typically represent the clubs "lie angle" (I am assuming the make of the clubs are PING) Black spot is PINGs way of saying standard lie angle and white (i think) is 2 degrees upright. PING actually have about 10 different colors for lie angle, black and white are just two of the spectrum If ther are not PING clubs, then I have no idea