"Since about May 25, crews have been seeing multiple species showing what we believe are signs of highly pathogenic avian influenza. The signs we are seeing widespread is a headshaking that we equate to "getting the cobwebs out", like a person may do when they first wake up. This behavior occurs regularly every couple minutes. This behavior has been observed in: black brant, cackling geese, bar-tailed godwits, dunlin, lapland longspurs, spectacled eiders, emperor geese, greater white-fronted geese, sabines gulls, glaucous gulls, and red-necked phalaropes."

This video shot on Thursday May 19th, shows the erratic circling behavior of a Canada goose. Although the cause is unknown, this type of behavior is according to USGS, "highly suggestive" of an infection with Highly Pathogenic Avian Influenza (HPAI).