Missing the Olive Back Sunbirds

Now that the 2nd fledging is gone, the adults does not come anymore.  Hopefully, they will be back next year to set up another nest.  My father-in-law says they will come back every year if they like the place.  I am keeping my fingers crossed.  Only problem is I may not have the right set up as this time the sweet potato plant was hanging over vertical surface making the sunbirds feel safe.