Magpies are ubiquitous in urban areas all over Australia, and have become accustomed to people. A small percentage of birds become highly aggressive during breeding season from late August to late November – early December or occasionally late February to late April – early May, and will swoop and sometimes attack passersby. Attacks begin as the eggs hatch, increase in frequency and severity as the chicks grow, and tail off as the chicks leave the nest. Magpie attacks occur in most parts of Australia, though it has been suggested that the Tasmanian magpie attacks much less frequently than in mainland Australia.