A mule deer being captured, collared with a GPS transmitter and released in Baker County last week. An additional 140 mule deer in the northern Blue Mountains are being collared this month as part of ODFW’s efforts to gather more precise data on mule deer populations, summer and winter ranges and migration corridors. Data from the GPS collared mule deer will replace an older population model and conventional wisdom about mule deer in the Blue Mountains and will better align tags with actual mule