Bull symbolize hard work, tenacity, courage and tolerance. Bull skull tattoos are very popular in Texas and the western United States. Native Americans and Mexico have a long tradition of using skull images in art. There are many different reasons for the popularity of this image. Some Native American tribes believe that the bull skull is a symbol of lifelong protection from all natural factors.
If you're looking for a bull skull tattoo design, take a look at the 55 Pretty Bull Skull Tattoos I prepared for you today. They can be designed in many different ways, and while they are popular to some extent, they are not mainstream.
Source: @robinstattoostudio