A Murder of Crows::There are names for specific groups depending on what they are doing at the time: a constable - crows/ravens standing guard over something; a conspiracy - if they are lurking in the shadows, apparently up to no good; and a terror or unkindness of ravens/crows – when dive-bombing or harassing prey or predator.
If you have a crow as a totem, you need to be willing to walk your talk and speak your truth. You must put aside your fear of being a voice in the wilderness and "caw" the shots as you see them. Crow is an omen of change. If he keeps appearing to you he may be telling you that you have a powerful voice when addressing issues that you do not quite understand or feel that they are out of balance.