[cobirds] Yard birds NE Colo Spgs

I have had W Tanagers, Male and female at my suet feeder for the last 14 days.  At first there was just one male and an occasional female but the last few days there are both male and female all day long.  The males are aggressive toward
others coming to feed but I have seen three males and two females at one time.  They even try to chase the WW doves away.  I also have Mountain Chickadees nesting in one of my boxes. 
 
Nina Ogilvie
Colorado Springs