The Breeder reconnainsance drone is a piece of technology used by a race of people the Tau'ri only knows as "Breeders".
Overview
The recon drone's only known function is reconnaisance, meaning they scan ememy territory for activity. They are unmanned, which means they either operate from a remote control, or are flown with a neural interface, similar to Eurondan aerofighters.
History
A recon drone was searching through the wreckage of the Eurondan capital to see if there was any activity on the underground base. When it finished scanning, it flew back, only to be destroyed before arriving in its destination by Jack O'Neill in the unmanned squadron of aerofighters. (SG1: "The Other Side")