Media monitoring using multiple types of signatures is disclosed. An example media monitoring method disclosed herein comprises processing signatures of a first type to monitor media presented by a media device until a first one of the signatures of the first type is determined to match a reference signature of the first type, the reference signature of the first type being associated with first reference media, and processing signatures of a second type to monitor the media presented by the media device after the first one of the signatures of the first type is determined to match the reference signature of the first type and until a number of signatures of the second type is determined not to match corresponding reference signatures of the second type, the reference signatures of the second type being associated with the first reference media.