Residents of the Bay area may be surprised to know how often mountain lions move among them….with negligible conflict. Mountain lions are an important part of the ecosystem. They prevent overgrazing and loss of habitat flora by ungulates, theyreduce herd size by keeping the deer on the move and they prevent rapid spread of diseases. The best news is that they don’t seem to want to be discovered! Their reclusive behavior points to deliberate avoidance of humans.