United Airlines plane returns to airport after 'possible wildlife' collision

Group 1 - A United Airlines flight from Colorado to Edmonton had to return to Denver due to a possible wildlife strike [1][3] - The aircraft involved was a Boeing 737-800, and it safely returned to the airport without any reported injuries [1][3] - United Airlines arranged for a new aircraft to transport the 153 passengers and six crew members to their destination [3] Group 2 - The specific type of wildlife involved in the incident is unclear, but reports suggest it may have been a rabbit [4] - In a separate incident, a Hawaiian Airlines flight aborted takeoff from Los Angeles due to a reported "vibration" in the nose wheel [4][5] - The Federal Aviation Administration is currently investigating the Hawaiian Airlines incident [5]