Hoping this graphic survives cyberspace for its visual effects......
I pulled the trigger too soon when I posted the 1997-98 bird, for which all sightings were at Duck Island in Ann Morrison Park in Boise, and those ebird dates were:
15 Nov 1997, 22 Nov 1997 (RL), 20 Dec 1997, 28 Jan 1998.... all IBRC reports/records except for RL's sighting as noted
Odds are that this was one and the same bird, considering all were seen at precisely the same location, and considering the BNA annual cycle below for migration (outer darker blue shell).
Suggesting our current bird could be here much of this winter, maybe? hedge-hedge-hedging….
Just for fun,
Figure 5. Annual cycle of migration, breeding, and molt of Brant in North America.
Thick lines show peak activity; thin lines, off-peak.