The Queen's personal Canadian Flag

Her Majesty's Personal Canadian flag and standards of members of the Royal Family will take precedence before the national flag; they are never half-masted.
These flags and standards, like all personal flags, are never used by others.
Although Her Majesty The Queen has several standards and personal flags which are displayed according to the event and the location, in Canada, only The Queen's Personal Canadian flag will be displayed to mark her presence (as illustrated above).
Royal flags and standards are normally provided by the Household Staff and are lent to the Department of Canadian Heritage Visit Staff prior to the visit; The Queen's Personal Canadian flag is obtained from Rideau Hall.
If more than one member of the Royal Family is present on an official visit, only the standard of the member taking precedence shall be flown.