Painted Pony has installed equipment on the tank to prevent other birds from becoming trapped.
Concerned that lighting at the $200-million site could confuse birds, delay their migration.
AER is dispatching an inspector to the nearly completed Fort Hills mine in northern Alberta.
Canaport LNG LP was originally charged with three violations in October 2014.
Alberta’s energy regulator identifies CNRL, Suncor Energy and Syncrude.