Tas crews search for missing hiker, 76

Rescuers are continuing to search Tasmanian wilderness for an experienced 76-year-old bushwalker last seen more than a month ago.

Police hold grave fears for James McLean, who on November 13 set off for a month-long trek in the state's far southwest but didn't return.

Four search teams plus a rescue helicopter resumed searching bush tracks on Friday for the Flinders Island man.