(Salem, OR) -- Poachers have killed at least 12 animals across Oregon over the last month and Oregon State Police are asking for help identifying the suspects. The animals that have been killed include Rocky Mountain Elk, black-tailed deer, bear cubs and big horn sheep. There are only 37-hundred California big horn sheep in Oregon, and it's extremely difficult to get a hunting tag. The head and ram horns were removed. Cash rewards and hunting preference points are offered for information that leads to the arrest of suspects in any of the poaching cases.