Although not strictly Magpies, Pied Crows go around in pairs a lot.
These two were scouting for wool from the sheep on this plot in Joburg where Warren is working on a project.
When he phoned me, W said that the crows just arrived. He got me to greet them through the loudspeaker (Avete, Corvi) and then, when I had rung off, they disappeared.
Those must be my spies.