Varys' Little birds

Little birds are the members of a network of spies and informants in the service of Varys, the Master of Whisperers on the small council of the Red Keep. Many of Varys' "little birds" are seemingly innocuous street children.

Varys' network spans not only the length and breadth of Westeros, but also Essos as far east as Vaes Dothrak and possibly even Qarth.