Australian Stone Curlew

This Australian Stone Curlew put on quite a display while I was trying to take photos of it at the Calgary Zoo. Several people standing nearby were quite amused at the way this bird kept turning its head at different angles while watching me through the glass. The name given was Australian Stone Curlew, but now I'm not sure if that means Bush Stone Curlew. Will have to check the sign when I am next there.