Thanks to Aaron Bowman and Keys (host for Xena the Warrior Costa's) for identifying the mystery hummer as a young ANNA’S. The overall hunched shape resembled a cold Costa's, as does the slightly curved bill. Thanks to Ava who got tail-shot photos showing the long tail extending past the wingtips; that definitively separates the Anna's from the Costa's.
Now the mystery is where did this bird hatch, how far did it fly to get to Ava's and where is it going? We will probably never know, but it's fun to speculate about it. Reports of local Anna's nesting needs to be documented.
The young hummer has not been seen since September 4th, though the male Anna’s continues to dominate Ava’s Place.
Seward Sporadic Bird Report Reporter