The Bird of Kildarby is a giant monstrous bird that was the pet of Lord Kildarby

Lord Kildarby made a deal with the Ghostbusters that if they defeated the Bird of Kildarby, he and his army would leave their castle and Manhattan forever. The team agreed and discovered the true danger presented by the Bird. They made a strategic retreat to Ecto-1 and quickly brainstormed a way to survive. The Ghostbusters managed to trap the bird by connecting two Traps to the Containment Unitand sending it in. Lord Kildarby and his army had nowhere to go so the Ghostbusters allowed them to stay if they tone down their habits of haunting the place during the day.