Still autochtonous (more or less) species. Old world birds evolved with them for thousands years and somehow they will not have problems to survive. We know to

Still autochtonous (more or less) species. Old world birds evolved with them for thousands years and somehow they will not have problems to survive. We know to do more research about the cat effect on that fauna instead to just repeat one preliminary study. We need to know for example, if there is a percentage of those migrant birds allegedly chased by cats in US that just crashed against a window or were stunded by pesticides. The problem in that case is not the cat, is the glass pane, or the absence of trees. ............... Second point. Some scientists hypothesize that Toxoplasmosis remain in the body alive for years and is a chronic disease. We should however take in mind that this is not the main current of thinking. We know that parasites don't survive usually when end in the wrong host because immune response works "like this" and "like that" and because the temperature, organ structure or life cycle of the true host, matter for the parasite survival. I can't see why Toxoplasma should behave different that the other ten thousands of cases, or why the immune system should make an excepcion here.