A retractable barb needle for drug darts

The mechanism and action of a new retractable barbneedle for drug darts are described.This dart needle misbhv tank top is particularly successful in obviating unnecessary flight reactions andtrauma in darted animals, and facilitates the complete injection of the drug dose before the barb is retracted and the dart is dislogded from the double door security bars animal.The whole process is completed within a few seconds and the expended dart can usually be retrieved in the immediate vicinity where the animal was darted.