Culling of badgers in areas such as New Zealand has focused on invasive species such as possums which have a different ecology to badgers native to Britain and Ireland. It can be argued that Britain and Ireland have a moral obligation to protect Badgers' watersheds. Therefore no comparison can be made (Roberts, MG, 1996). In the immediate vicinity of localized culls, the level of tuberculosis increased further due to disturbance effects and rates dispersed due to evidence disturbance. This consequently increased the transmission of M.bovis. Proactive and widespread abatement produces the greatest benefits in terms of invested costs, but this has led to an increase in the prevalence of tuberculosis in surrounding areas, further failing to contain and eradicate the disease. Stable demographic conditions are also needed to further limit the disease. Throughout the research conducted, almost all studies stated that more work needs to be done to demonstrate a causal effect between badgers and tuberculosis transmitted to cattle. Correlation is not