Northern Prairie Wildlife Research Center
Brant (Branta bernicla) did not take alarm at an exposed observer, even though he moved a bit, so long as he did not stand upright. Bright yellow oilskins, regular apparel both in and out of boats in Izembek Lagoon, did not deter approaching birds. Disturbing factors, in addition to waterfowl hunters, included airplanes and avian predators.