Abstract: A search apparatus is provided for an aircraft. The search apparatus includes a transparent observation chamber and a plurality of bulkheads which divide the chamber into at least two compartments. A cradle is mounted within each compartment for supporting a bird with the head of the bird facing outwardly with respect to the chamber. A peck key is mounted in each chamber in proximity to the outward end of the cradle, and a tray is provided for containing food for the bird. A device is mounted within each compartment for sliding the tray inwardly or outwardly, the outward position being adapted to present food to the bird and the inward position being adapted to withdraw food from the bird. Indicators may be connected to the peck keys for indicating which bird in a chamber has visual contact with an object, and a control device may be provided for selectively actuating the food trays for the inward and outward movements.