Deer Motion Detector What Kind Of Motion Detector Will Alert Me To Deer Etc In My Garden?

What kind of motion detector will alert me to deer etc in my garden? - deer motion detector

I want to make an alarm system for my lawn to see deer and smaller animals, then perhaps frighten the dog. The garden is 100 meters from my house and measures 75x75 meters. What is the best kind of motion sensor for this application? Battery cables or wireless or power line, the manufacturer, the details have been happier!