#$%^&*AU2014250633C120160428.pdf#####ABSTRACT The present invention relates to alarm and warning systems and methods for detecting the approach of objects to a prohibited area and eliciting a warning or an alarm when 5 such objects are detected. More specifically the present invention relates to bird radar systems and methods for use at for instance airports or wind parks to provide a warning or an alarm when birds are approaching. The detection system according to the invention comprises one or more processors configured to detect and track a bird and to generate an alarm or alert when a tracked bird enters an alarm zone inside a radar 10 coverage range, wherein the one or more processors are configured to dynamically arrange the alarm zone within the radar coverage range using real time information. 0 153 0-AU1/9 CN LL