Dragonflies use their acute vision to detect and track prey before taking off for an aerial interception. Due to the limited bandwidth available in the ventral nerve cord of the dragonfly, the rich visual information acquired in the hunt scenario must be reduced to a critical set of parameters that encode the most relevant target information. A set of 16 visually responsive neurons called Target Selective Descending Neurons (TSDNs) run through the neck connective, bridging the brain to the motor centres of the dragonfly. These cells have been shown to strongly select prey movement direction in large spatial receptive fields. A population vector coding has been suggested as a potential encoding mechanism for the prey directionality, and yet information theory predicts that TSDNs encode both direction and position information. Using newly recorded high-resolution receptive fields, we explore a unifying model that accounts for the spatial-directional encoding, and their coupling. This work highlights the efficient information encoding in an insect neural circuit and reveals how visual information might be used for a complex behaviour such as aerial interception.