Hawk occupancy

   MultiState  Multi Season

   Multiple surveys of hawks to establish occupancy and if breeding.
   6 years x up to 9 visits/year at a number of territories.   

   Recorded: 
       NA = site not visited 
       0 = site visited, but no hawk detected 
       1 = site visited, hawk detected, but breeding status not confirmedM
       2 = site visited, breeding status confirmed 

   For each territory, the size of suitable habitat is measured.