[cobirds] Prothonotary?

I assume several people have probably checked on the Prothonotary Warbler at Centennial Park since the cold snap hit.  And I assume since there have been no reports, the bird disappeared.  Are these good assumptions?  Negative data is better than no data.  But if buckthorn berries got that bird thru the deep freeze, that would be very interesting news, indeed.  Thank for any feedback, public or private on this situation.

Dave Leatherman
Fort Collins