well george i think the crows "ark ark" call comes from the word hailer. so on the count of three i'll say ark ark you say hailer ok ready one two three ark ark ark! hailer! ark ark ark hailer! this to prove it as experiment george. ark ark ark. hailer hailer boing faye ark ark hailer ark ark ark. see boing you're divorced faye. i was right ark ark does come the word "hailer".