Robo call identified itself as "Green Study Research Co. saying I had been selected to participate in a 'survey" and win a trip to the Bahamas.
Of course the number is bogus and its a telemarketer posing as a survey.  I hung up and called back and got a recording that said the "survey" was closed and If I wanted to be removed from any further calls to press some number which I couldn't understand because the recording was messed up.  If I could find out who is making these calls I would go to their trailer and knock it off its blocks!